Plants
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Species (family)
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Common name(s)
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Native to Hawaii?
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Present in Hawaii?
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Established in Hawaii?
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| Abarema clypearia (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Abelia grandiflora (Caprifoliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Abelmoschus esculentus (Malvaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Abelmoschus manihot subsp. manihot (Malvaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Abelmoschus manihot subsp. tetraphyllus (Malvaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Abelmoschus moschatus (Malvaceae) | musk okra, muskmallow, tropical jewel hibiscus | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Abies pinsapo (Pinaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Abies sp. (Pinaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Abronia maritima (Nyctaginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Abronia umbellata (Nyctaginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Abrus precatorius (Fabaceae) | bead vine, black-eyed Susan, coral bead plant, coralbean, crab's-eye, Indian licorice, jequirity, jequirity bean, licorice vine, love bean, lucky bean, minnie-minnies, prayer beads, prayerbead, precatory, precatory bean, pūkiawe, pūkiawe lei, pūkiawe lenalena, pūpūkiawe, red beadvine, rosary pea, weatherplant, weathervine | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Abutilon darwinii x pictum (Malvaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Abutilon eremitopetalum (Malvaceae) | hidden-petaled abutilon | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Abutilon grandiflorum (Malvaceae) | hairy abutilon | NOT native to Hawaii | ?unresearched | ?unresearched |
| Abutilon grandifolium (Malvaceae) | hairy abutilon, ma‘o | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Abutilon hirtum (Malvaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Abutilon incanum (Malvaceae) | hoary abutilon | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Abutilon indicum (Malvaceae) | abutilon, Indian abutilon, Indian mallow | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Abutilon megapotamicum (Malvaceae) | trailing abutilon | NOT native to Hawaii | ?unresearched | ?unresearched |
| Abutilon menziesii (Malvaceae) | ko'oloa'ula, kooloaula | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Abutilon pictum (Malvaceae) | abutilon | NOT native to Hawaii | ?unresearched | ?unresearched |
| Abutilon sachetianum (Malvaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Abutilon sandwicense (Malvaceae) | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Abutilon theophrasti (Malvaceae) | abutilon hemp, butterprint, buttonweed, China-jute, Indian mallow, Indian-mallow, Tientsin-jute, velvetleaf, velvetweed | NOT native to Hawaii | ?unresearched | ?unresearched |
| Acacia acuminata (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acacia aneura (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acacia aulacocarpa (Fabaceae) | brown salwood, brush ironbark wattle, hickory wattle | NOT native to Hawaii | ?unresearched | ?unresearched |
| Acacia auriculiformis (Fabaceae) | auri, earleaf acacia, earpod wattle, northern black wattle, Papuan wattle, tan wattle | NOT native to Hawaii | ?unresearched | ?unresearched |
| Acacia baileyana (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acacia blakelyi (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acacia boliviana (Fabaceae) | Bolivian wattle | NOT native to Hawaii | ?unresearched | ?unresearched |
| Acacia concinna (Fabaceae) | chikakai, piquant sappan, sappan, soap pod | NOT native to Hawaii | ?unresearched | ?unresearched |
| Acacia confusa (Fabaceae) | Formosa acacia, Formosa koa, Formosan koa | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Acacia crassicarpa (Fabaceae) | northern wattle, Papua New Guinea red wattle | NOT native to Hawaii | ?unresearched | ?unresearched |
| Acacia curassavica (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acacia cyclops (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acacia dealbata (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acacia decurrens (Fabaceae) | NOT native to Hawaii | PRESENT in Hawaii | ?unresearched | |
| Acacia dodonaeifolia (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acacia dunnii (Fabaceae) | Dunn's wattle, elephant-ear wattle | NOT native to Hawaii | ?unresearched | ?unresearched |
| Acacia elata (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acacia farnesiana (Fabaceae) | aroma, cassie, Ellington curse, huisache, klu, kolū, opopanax, popinac, sweet acacia | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Acacia floribunda (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acacia glauca (Fabaceae) | redwood, wild dividivi | NOT native to Hawaii | ?unresearched | ?unresearched |
| Acacia holosericea (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Acacia iteaphylla (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acacia koa (Fabaceae) | koa | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Acacia koaia (Fabaceae) | dwarf koa, koaia | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Acacia lasiocalyx (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acacia longifolia (Fabaceae) | coast wattle, golden rods, golden wattle, long-leaved acacia, long-leaved wattle, sallow wattle, Sydney golden wattle | NOT native to Hawaii | ?unresearched | ?unresearched |
| Acacia longifolia subsp. longifolia (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acacia longifolia subsp. sophorae (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acacia longifolia var. longifolia (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acacia longifolia var. sophorae (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acacia mangium (Fabaceae) | black wattle, hickory wattle, mangium, mangium wattle | NOT native to Hawaii | ?unresearched | ?unresearched |
| Acacia mearnsii (Fabaceae) | black wattle, tan wattle | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Acacia melanoxylon (Fabaceae) | Australian blackwood, blackwood, blackwood acacia | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Acacia microbotrya (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acacia microbotrya var. microbotrya (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acacia nilotica (Fabaceae) | algaroba, babul, black thorn, Egyptian thorn, gum arabic tree, Nile acacia, prickly acacia, thorny acacia | NOT native to Hawaii | ?unresearched | ?unresearched |
| Acacia nilotica subsp. indica (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acacia paradoxa (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acacia parramattensis (Fabaceae) | Parrmatta green wattle, Sydney green wattle | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Acacia podalyriifolia (Fabaceae) | Queensland silver wattle | NOT native to Hawaii | ?unresearched | ?unresearched |
| Acacia pravissima (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acacia prominens (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acacia pycnantha (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acacia retinodes (Fabaceae) | water wattle | NOT native to Hawaii | ?unresearched | ?unresearched |
| Acacia saligna (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acacia sinuata (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acacia sophorae (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acacia sp. (Fabaceae) | acacia | NOT native to Hawaii | ?unresearched | ?unresearched |
| Acacia spp. (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Acacia verticillata (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acaena agnipila (Rosaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acaena agnipila var. tenuispica (Rosaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acaena echinata var. retrorsumpilosa (Rosaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acaena echinata var. tylacantha (Rosaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acaena exigua (Rosaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Acaena novae-zelandiae (Rosaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acaena ovalifolia (Rosaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acalypha alopecuroidea (Euphorbiaceae) | foxtail copperleaf | NOT native to Hawaii | ?unresearched | ?unresearched |
| Acalypha godseffiana (Euphorbiaceae) | beefsteak, copper leaf | NOT native to Hawaii | ?unresearched | ?unresearched |
| Acalypha hispida (Euphorbiaceae) | chenille plant | NOT native to Hawaii | ?unresearched | ?unresearched |
| Acalypha indica (Euphorbiaceae) | copperleaf, Indian acalypha, Indian-nettle | NOT native to Hawaii | ?unresearched | ?unresearched |
| Acalypha lanceolata (Euphorbiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acalypha reptans (Euphorbiaceae) | cat tail | NOT native to Hawaii | ?unresearched | ?unresearched |
| Acalypha setosa (Euphorbiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Acalypha siamensis (Euphorbiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Acalypha virginica (Euphorbiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acalypha wilkesiana (Euphorbiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acanthocereus pentagonus (Cactaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acanthocereus tetragonus (Cactaceae) | barbed-wire cactus, sword-pear, triangle cactus | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Acanthophora pacifica (Rhodomelaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Acanthophora spicifera (Rhodomelaceae) | prickly seaweed, spiny seaweed | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Acanthospermum australe (Asteraceae) | ‘ihi kūkae hipa, ihi kukae hipa, kūkaehipa, kukaehipa, Paraguay bur, Paraguay starbur, pipili, sheepbur, spiny bur, spiny-bur | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Acanthospermum hispidum (Asteraceae) | bristly starbur, goat's head, hispid starburr, starburr | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Acanthospermum microcarpum (Asteraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acanthus mollis (Acanthaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acca sellowiana (Myrtaceae) | feijoa, pineapple guava | NOT native to Hawaii | ?unresearched | ?unresearched |
| Acer campestre (Aceraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acer ginnala (Aceraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acer negundo (Aceraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acer palmatum (Aceraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acer platanoides (Aceraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acer pseudoplatanus (Aceraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acetosa sagittata (Polygonaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acetosa vesicaria (Polygonaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acetosella vulgaris (Polygonaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Achillea distans (Asteraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Achillea millefolium (Asteraceae) | common yarrow, milfoil | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Achillea millefolium var. millefolium (Asteraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Achillea nobilis (Asteraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Achillea ptarmica (Asteraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Achnatherum brachychaetum (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Achnatherum calamagrostis (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Achnatherum caudatum (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Achnatherum spp. (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Achyranthes aspera (Amaranthaceae) | chaff-flower, crocus stuff, crokars staff, devil's horsewhip, prickly achyranthes, prickly chaff-flower | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Achyranthes atollensis (Amaranthaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Achyranthes indica (Amaranthaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Achyranthes mutica (Amaranthaceae) | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Achyranthes philoxeroides (Amaranthaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Achyranthes splendens (Amaranthaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Achyranthes splendens var. rotundata (Amaranthaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Achyranthes splendens var. splendens (Amaranthaceae) | achyranthes | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Acinos arvensis (Lamiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Acmella oleracea (Asteraceae) | Para cress, para-cress, toothache plant | NOT native to Hawaii | ?unresearched | ?unresearched |
| Acmella sodiroi (Asteraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acmella uliginosa (Asteraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acmena smithii (Myrtaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Acoelorraphe wrightii (Arecaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acoelorrhaphe wrightii (Arecaceae) | Everglades palm, paurotis palm, saw cabbage palm, silver saw palm | NOT native to Hawaii | ?unresearched | ?unresearched |
| Acolium hawaiiense (Physciaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Aconitum carmichaelii (Ranunculaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Aconitum napellus (Ranunculaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Acorus calamus (Araceae) | (unresearched) | ?unresearched | ?unresearched | |
| Acorus sp. (Araceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Acrocephalus familiaris (Lamiaceae) | millerbird | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Acrocephalus familiaris subsp. kingi (Lamiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Acrochaetium hypneae (Acrochaetiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Acrochaetium microscopicum (Acrochaetiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Acromastigum integrifolium (Lepidoziaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Acroporium fuscoflavum (Sematophyllaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Acroptilon repens (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Acroscyphus sphaerophoroides (Physciaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Actinidia arguta (Actinidiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Actinoscirpus grossus (Cyperaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Actinotrichia fragilis (Galaxauraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Actinotus helianthi (Apiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Adansonia digitata (Bombacaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Adansonia rubrostipa (Bombacaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Adansonia suarezensis (Bombacaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Adenanthera abrosperma (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Adenanthera pavonina (Fabaceae) | bead tree, coral bean tree, coralwood, false wiliwili, peacock flower-fence, Polynesian peanut, red bead tree, red sandalwood tree | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Adenium obesum (Apocynaceae) | desert rose, mock azalea | NOT native to Hawaii | ?unresearched | ?unresearched |
| Adenophorus abietinus (Grammitidaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Adenophorus epigaeus (Grammitidaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Adenophorus haalilioanus (Grammitidaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Adenophorus hymenophylloides (Grammitidaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Adenophorus oahuensis (Grammitidaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Adenophorus periens (Grammitidaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Adenophorus pinnatifidus var. pinnatifidus (Grammitidaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Adenophorus pinnatifidus var. rockii (Grammitidaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Adenophorus tamariscinus (Grammitidaceae) | wahine noho mauna | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Adenophorus tamariscinus var. montanus (Grammitidaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Adenophorus tamariscinus var. tamariscinus (Grammitidaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Adenophorus tripinnatifidus (Grammitidaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Adenostemma platyphyllum (Asteraceae) | adenostemma, clubwort | NOT native to Hawaii | ?unresearched | ?unresearched |
| Adenostemma viscosum (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Adiantopsis chlorophylla (Pteridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Adiantum capillus-veneris (Pteridaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Adiantum hispidulum (Pteridaceae) | rough maidenhair fern | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Adiantum raddianum (Pteridaceae) | delta maidenhair fern, maidenhair fern | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Adiantum sp. (Pteridaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Adiantum tenerum (Pteridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Adiantum thalictroides (Pteridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Adonis microcarpa (Ranunculaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Adoxa moschatellina (Adoxaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Aechmea bracteata (Bromeliaceae) | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Aechmea rubens (Bromeliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Aegilops cylindrica (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Aegilops geniculata (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Aegilops triuncialis (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Aegopodium podagraria (Apiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Aeonium arboreum (Crassulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Aeonium arboreum cv. Atropurpureum (Crassulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Aeonium haworthii (Crassulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Aeonium sp. (Crassulaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Aerobryopsis longissima (Meteoriaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Aerobryopsis subdivergens (Meteoriaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Aerobryopsis subdivergens subsp. scariosa (Meteoriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Aerobryopsis wallichii (Meteoriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Aerva javanica (Amaranthaceae) | aerva, kapok bush, snow bush | NOT native to Hawaii | ?unresearched | ?unresearched |
| Aeschynomene americana (Fabaceae) | American joint vetch, joint vetch, shyleaf | NOT native to Hawaii | ?unresearched | ?unresearched |
| Aeschynomene americana var. americana (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Aeschynomene indica (Fabaceae) | budda pea, curly-indigo, hard sola, Indian joint-vetch, kat sola, northern joint-vetch, sensitive jointed vetch, sensitive vetch | NOT native to Hawaii | ?unresearched | ?unresearched |
| Aeschynomene micranthos (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Aeschynomene villosa (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Aesculus hippocastanum (Sapindaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Agapanthus orientalis (Liliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Agapanthus praecox (Liliaceae) | lily of the Nile | NOT native to Hawaii | ?unresearched | ?unresearched |
| Agapanthus praecox subsp. orientalis (Liliaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Agapanthus praecox subsp. praecox (Liliaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Agapanthus spp. (Liliaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Agardhiella subulata (Solieriaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Agastache foeniculum (Lamiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Agastache rugosa (Lamiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Agathis macrophylla (Araucariaceae) | Pacific kauri | (unresearched) | ?unresearched | ?unresearched |
| Agathis robusta (Araucariaceae) | Queensland kauri | NOT native to Hawaii | ?unresearched | ?unresearched |
| Agave americana (Agavaceae) | American aloe, century plant, malina | NOT native to Hawaii | ?unresearched | ?unresearched |
| Agave americana var. americana (Agavaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Agave americana var. picta (Agavaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Agave attenuata (Agavaceae) | swan's neck agave | NOT native to Hawaii | ?unresearched | ?unresearched |
| Agave filifera (Agavaceae) | agave | NOT native to Hawaii | ?unresearched | ?unresearched |
| Agave sisalana (Agavaceae) | agave, century plant, malina, sisal, sisal hemp | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Agave sp. (Agavaceae) | agave | NOT native to Hawaii | ?unresearched | ?unresearched |
| Agave spp. (Agavaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Agave stricta (Agavaceae) | hedgehog agave | NOT native to Hawaii | ?unresearched | ?unresearched |
| Agave vivipara var. vivipara (Agavaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Ageratina adenophora (Asteraceae) | catweed, croftonweed, hemp agrimony, Maui pamakani, Maui pāmakani, Mexican devil, pāmakani haole, pamakani haole, sticky agrimony, sticky snakeroot | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Ageratina herbacea (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ageratina occidentalis (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ageratina riparia (Asteraceae) | creeping croftonweed, Hamakua pamakani, hāmākua pāmakani, mist flower, river eupatorium, spreading mist flower, spreading mistflower | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Ageratina shastensis (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ageratum conyzoides (Asteraceae) | ageratum, billygoat-weed, chick weed, goatweed, maile hohono, maile honohono, maile kula, whiteweed | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Ageratum conyzoides subsp. conyzoides (Asteraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Ageratum houstonianum (Asteraceae) | ageratum, blue billygoat weed, bluemink, flossflower, goatweed, maile hohono, maile honohono, maile kula | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Aglaia mariannensis (Meliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Aglaia odorata (Meliaceae) | Chinese rice flower | NOT native to Hawaii | ?unresearched | ?unresearched |
| Aglaonema commutatum (Araceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Aglaonema sp. (Araceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Agonis flexuosa (Myrtaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Agropogon littoralis (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Agropyron cristatum (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Agropyron desertorum (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Agropyron elongatum (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Agropyron intermedium (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Agropyron pectiniforme (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Agropyron repens (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Agropyron spicatum (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Agropyron triticeum (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Agrostemma githago (Caryophyllaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Agrostis avenacea (Poaceae) | heupueo | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Agrostis canina (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Agrostis capillaris (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Agrostis capillaris var. aristata (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Agrostis capillaris var. capillaris (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Agrostis exarata (Poaceae) | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Agrostis exarata microphylla (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Agrostis fallax (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Agrostis gigantea (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Agrostis interrupta (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Agrostis kauaiensis (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Agrostis perennans (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Agrostis retrofracta (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Agrostis sandwicensis (Poaceae) | bentgrass | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Agrostis spica-venti (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Agrostis spp. (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Agrostis stolonifera (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Agrostis tenuis (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ahnfeltiopsis coccina (Rhodomelaceae) | (unresearched) | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Ahnfeltiopsis concinna (Rhodomelaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ahnfeltiopsis flabelliformis (Rhodomelaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ailanthus altissima (Simaroubaceae) | China sumac, Chinese tree of heaven, stinktree, tree of heaven, varnishtree | NOT native to Hawaii | ?unresearched | ?unresearched |
| Aira caryophyllea (Poaceae) | silver hairgrass | NOT native to Hawaii | ?unresearched | ?unresearched |
| Aira cupaniana (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Aira elegans (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Aira elegantissima (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Aira nubigena (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Aira praecox (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ajuga genevensis (Lamiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Ajuga reptans (Lamiaceae) | ajuga, blue bugle, bugleherb, bugleweed, common bugle, common bugleweed | NOT native to Hawaii | ?unresearched | ?unresearched |
| Akalaphycus setchilliae (Liagoraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Akebia quinata (Lardizabalaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Albizia chinensis (Fabaceae) | Chinese albizia, silktree | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Albizia julibrissin (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Albizia lebbeck (Fabaceae) | East Indian walnut, frywood, Indian siris, koko, lebbek, lebbek tree, ‘ohai, rain tree, raom tree, silver raintree, siris rain tree, siris tree, soros-tree, woman's tongue | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Albizia lophantha (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Albizia procera (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Albizzia julibrissin (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Albizzia lebbek (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Albuca canadensis (Liliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Alcea rosea (Malvaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Alchemilla vulgaris (Rosaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Alectryon macrococcus (Sapindaceae) | mahoe | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Alectryon macrococcus var. auwahiensis (Sapindaceae) | mahoe | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Alectryon macrococcus var. macrococcus (Sapindaceae) | mahoe | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Alectryon tomentosus (Sapindaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Aleurites fordii (Euphorbiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Aleurites moluccana (Euphorbiaceae) | candlenut, Indian walnut, kukui | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Alhagi camelorum (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Alhagi maurorum (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Alhagi pseudalhagi (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Alisma gramineum (Alismataceae) | (unresearched) | ?unresearched | ?unresearched | |
| Alisma lanceolata (Alismataceae) | (unresearched) | ?unresearched | ?unresearched | |
| Alisma lanceolatum (Alismataceae) | (unresearched) | ?unresearched | ?unresearched | |
| Alisma orientale (Alismataceae) | (unresearched) | ?unresearched | ?unresearched | |
| Alisma plantago-aquatica (Alismataceae) | (unresearched) | ?unresearched | ?unresearched | |
| Alisma spp. (Alismataceae) | (unresearched) | ?unresearched | ?unresearched | |
| Allamanda blanchetii (Apocynaceae) | purple allamanda | NOT native to Hawaii | ?unresearched | ?unresearched |
| Allamanda cathartica (Apocynaceae) | allamanda, brownbud allamanda, cup of gold, golden allamanda, golden cup, golden trumpet, yellow allamanda, yellow trumpet vine | NOT native to Hawaii | ?unresearched | ?unresearched |
| Allamanda schottii (Apocynaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Alliaria officinalis (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Alliaria petiolata (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Allium ampeloprasum (Liliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Allium carinatum (Liliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Allium cepa (Liliaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Allium fistulosum (Liliaceae) | green onion | NOT native to Hawaii | ?unresearched | ?unresearched |
| Allium giganteum (Liliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Allium neapolitanum (Liliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Allium oleraceum (Liliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Allium paniculatum subsp. paniculatum (Liliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Allium sativum (Liliaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Allium schoenoprasum (Liliaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Allium scorodoprasum (Liliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Allium triquetrum (Liliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Allium vineale (Liliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Allocasuarina huegeliana (Casuarinaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Alloxylon flammeum (Proteaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Alnus glutinosa (Betulaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Alnus incana (Betulaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Alnus nepalensis (Betulaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Alnus rubra (Betulaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Alocasia brisbanensis (Araceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Alocasia cucullata (Araceae) | Chinese ape, Chinese taro | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Alocasia macrorrhiza (Araceae) | ape | NOT native to Hawaii | ?unresearched | ?unresearched |
| Alocasia macrorrhizos (Araceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Alocasia micholitziana (Araceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Alocasia sp. (Araceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Aloe arborescens (Aloeaceae) | candelabra aloe, candelabra plant, ocotopus aloe, octopus plant, torch plant | NOT native to Hawaii | ?unresearched | ?unresearched |
| Aloe aristata (Aloeaceae) | lace aloe, torch plant | NOT native to Hawaii | ?unresearched | ?unresearched |
| Aloe cameronii (Aloeaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Aloe ferox (Aloeaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Aloe maculata (Aloeaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Aloe saponaria (Aloeaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Aloe saponaria var. ficksburgensis (Aloeaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Aloe spp. (Aloeaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Aloe suzannae (Aloeaceae) | aloe | NOT native to Hawaii | ?unresearched | ?unresearched |
| Aloe vera (Aloeaceae) | aloe | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Alopecurus aequalis (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Alopecurus arundinaceus (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Alopecurus geniculatus (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Alopecurus myosuroides (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Alopecurus pratensis (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Aloysia citriodora (Verbenaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Alphitonia ponderosa (Rhamnaceae) | kauila | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Alphitonia zizyphoides (Rhamnaceae) | toi | (unresearched) | ?unresearched | ?unresearched |
| Alpinia allughas (Zingiberaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Alpinia foxworthyi (Zingiberaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Alpinia luteocarpa (Zingiberaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Alpinia mutica (Zingiberaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Alpinia nieuwenhuizii (Zingiberaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Alpinia nigra (Zingiberaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Alpinia pubiflora (Zingiberaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Alpinia purpurata (Zingiberaceae) | ‘awapuhi ‘ula‘ula, red ginger | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Alpinia zerumbet (Zingiberaceae) | light galangal, pink porcelain lily, pink porcelain-lily, shell flower, shell ginger | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Alsinidendron lychnoides (Caryophyllaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Alsinidendron obovatum (Caryophyllaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Alsinidendron trinerve (Caryophyllaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Alsinidendron viscosum (Caryophyllaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Alstonia macrophylla (Apocynaceae) | batino, devil-tree, hard alstonia | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Alstroemeria aurea (Liliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Alternanthera albotomentosa (Amaranthaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Alternanthera bettzickiana (Amaranthaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Alternanthera brasiliana (Amaranthaceae) | Brazilian joyweed, Joseph's coat, purple alternanthera | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Alternanthera caracasana (Amaranthaceae) | mat chaff flower | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Alternanthera dentata (Amaranthaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Alternanthera ficoidea (Amaranthaceae) | sanguinarea | (unresearched) | ?unresearched | ?unresearched |
| Alternanthera lanceolata (Amaranthaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Alternanthera mexicana (Amaranthaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Alternanthera paronichyoides (Amaranthaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Alternanthera philoxeroides (Amaranthaceae) | alligator weed | NOT native to Hawaii | ?unresearched | ?unresearched |
| Alternanthera pubiflora (Amaranthaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Alternanthera pungens (Amaranthaceae) | khaki weed | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Alternanthera sessilis (Amaranthaceae) | dwarf copperleaf, joyweed, palewāwae, sessile joyweed | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Alternanthera spp. (Amaranthaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Alternanthera tenella (Amaranthaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Alternaria passiflorae (Pleosporaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Alysicarpus bupleurifolius (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Alysicarpus ovalifolius (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Alysicarpus vaginalis (Fabaceae) | alyce clover, alysicarpus, buffalo clover, one-leaf clover | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Alysicarpus vaginatum (Fabaceae) | Alyce clover | (unresearched) | ?unresearched | ?unresearched |
| Alyssum alyssoides (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Alyssum desertorum (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Alyssum linifolium (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Alyssum saxatile (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Alyxia oliviformis (Apocynaceae) | maile | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Alyxia stellata (Apocynaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Amansia glomerata (Rhodomelaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Amaranthus albus (Amaranthaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Amaranthus blitum (Amaranthaceae) | amaranth, livid amaranth, purple amaranth, slender amaranth | NOT native to Hawaii | ?unresearched | ?unresearched |
| Amaranthus brownii (Amaranthaceae) | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Amaranthus caudatus (Amaranthaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Amaranthus cruentus (Amaranthaceae) | bush greens, caterpillar amaranth, prince's feather, purple amaranth, red amaranth, red shank | NOT native to Hawaii | ?unresearched | ?unresearched |
| Amaranthus deflexus (Amaranthaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Amaranthus dubius (Amaranthaceae) | amaranth, spleen amaranth | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Amaranthus gracilis (Amaranthaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Amaranthus graecizans subsp. sylvestris (Amaranthaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Amaranthus hybridus (Amaranthaceae) | green amaranth, green pigweed, hybrid amaranth, prince's feather, slim amaranth, smooth amaranth, smooth pigweed | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Amaranthus interruptus (Amaranthaceae) | amaranth | NOT native to Hawaii | ?unresearched | ?unresearched |
| Amaranthus muricatus (Amaranthaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Amaranthus palmeri (Amaranthaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Amaranthus powellii (Amaranthaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Amaranthus retroflexus (Amaranthaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Amaranthus spinosus (Amaranthaceae) | edlebur, needle burr, pakai kukū, pakai kuku, pukai kukū, spiny amaranth, thorny amaranth, thorny pigweed | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Amaranthus tricolor (Amaranthaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Amaranthus viridis (Amaranthaceae) | ‘aheahea, aheahea, green amaranth, pakai, pākaikai, pakaikai, pakapakai, pigweed, slender amaranth, tropical green amaranth | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Amaryllis belladonna (Liliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Amauropelta globulifera (Thelypteridaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Ambrosia artemisiifolia (Asteraceae) | ambrosia, annual ragweed, bitterweed, common ragweed, ragweed, Roman wormwood | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Ambrosia psilostachya (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ambrosia tenuifolia (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ambrosia tomentosa (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ambrosia trifida (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ammannia auriculata (Lythraceae) | eared redstem, redstem | NOT native to Hawaii | ?unresearched | ?unresearched |
| Ammannia baccifera (Lythraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ammannia coccinea (Lythraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ammi majus (Apiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ammophila arenaria (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ammophila spp. (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Amomobryum angustirete (Bryaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Amorpha fruticosa (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Amorphophallus lambii (Araceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ampelamus albidus (Apocynaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ampelopsis arborea (Vitaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ampelopsis brevipedunculata (Vitaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ampelopsis cordata (Vitaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Amphidium lapponicum (Dicranaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Amphidium tortuosum (Dicranaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Amphiroa beauvoisii (Corallinaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Amphiroa rigida (Corallinaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Amsinckia calycina (Boraginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Amsinckia intermedia (Boraginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Amsinckia lycopsoides (Boraginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Amsinckia tessellata (Boraginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Anacardium occidentale (Anacardiaceae) | cashew, cashew nut | NOT native to Hawaii | ?unresearched | ?unresearched |
| Anacystis marina (Chroococcaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Anagallis arvensis (Primulaceae) | bird's-eye, poor man's weatherglass, red chickweed, scarlet pimpernel, shepherd's-weatherglass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Anagallis arvensis var. arvensis (Primulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Anagallis arvensis var. caerulea (Primulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Anagallis minima (Primulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Anagallis pumila (Primulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ananas comosus (Bromeliaceae) | pineapple | NOT native to Hawaii | ?unresearched | ?unresearched |
| Anaptychia leucomelos (Physciaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Anastrepta orcadensis (Jungermanniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Anastrophyllum esenbeckii (Jungermanniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Anastrophyllum fissum (Jungermanniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Anchusa arvensis (Boraginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Anchusa azurea (Boraginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Anchusa capensis (Boraginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Anchusa officinalis (Boraginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Andreaea acutifolia (Andreaeaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Andreaea acutifolia subsp. acuminata (Andreaeaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Andreaea perpapillosa (Andreaeaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Andreaea rupestris (Andreaeaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Andropogon bicornis (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Andropogon gayanum (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Andropogon gayanus (Poaceae) | gamba grass, tambuki grass | NOT native to Hawaii | ?unresearched | ?unresearched |
| Andropogon glomeratus (Poaceae) | bushy beardgrass, bushy bluestem, chalky bluestem | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Andropogon intermedius (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Andropogon nodosus (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Andropogon sericeus (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Andropogon virginicus (Poaceae) | broomsedge, whisky grass, yellow bluestem | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Anemone hupehensis (Ranunculaceae) | Japanese anemone | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Anethum graveolens (Apiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Angelica sylvestris (Apiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Angelonia angustifolia (Scrophulariaceae) | angelonia, monkey face, narrowleaf angelon | NOT native to Hawaii | ?unresearched | ?unresearched |
| Angelonia salicariifolia (Scrophulariaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Angiopteris evecta (Marattiaceae) | giant fern, king's fern, mule's-foot fern | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Angophora costata (Myrtaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Angraecum comorense (Orchidaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Angraecum leonis (Orchidaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Anigozanthos flavidus (Haemodoraceae) | kangaroo paw | NOT native to Hawaii | ?unresearched | ?unresearched |
| Anigozanthos manglesii (Haemodoraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Anisantha diandra (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Aniseia martinicensis (Convolvulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Annona cherimola (Annonaceae) | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Annona glabra (Annonaceae) | alligator apple, bullock's heart, cherimoyer, pond apple | NOT native to Hawaii | ?unresearched | ?unresearched |
| Annona muricata (Annonaceae) | prickly custard apple, soursop | NOT native to Hawaii | ?unresearched | ?unresearched |
| Annona reticulata (Annonaceae) | bullock's-heart, custard apple | NOT native to Hawaii | ?unresearched | ?unresearched |
| Annona squamosa (Annonaceae) | custard apple, sugar apple, sweetsop | NOT native to Hawaii | ?unresearched | ?unresearched |
| Anoda acerifolia (Malvaceae) | anoda | NOT native to Hawaii | ?unresearched | ?unresearched |
| Anodendron paniculatum (Apocynaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Anoectangium aestivum (Pottiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Anoectangium skottsbergii (Pottiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Anoectochilus sandvicensis (Orchidaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Anomatheca laxa (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Anomobryum angustirete (Bryaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Anotrichium secundum (Ceramiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Anotrichium tenue (Ceramiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Anredera cordifolia (Basellaceae) | lamb's tails, Madeira vine, mignonette vine, ‘uala hūpē, uala hupe | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Anthemis arvensis (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Anthemis cotula (Asteraceae) | foetid chamomile, mayweed | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Anthephora hermaphrodita (Poaceae) | old-field grass | (unresearched) | ?unresearched | ?unresearched |
| Anthoceros fuciformis (Anthocerotaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Anthoceros glandulosus (Anthocerotaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Anthoxanthum aristatum (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Anthoxanthum odoratum (Poaceae) | spring grass, sweet vernalgrass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Anthriscus caucalis (Apiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Anthriscus sylvestris (Apiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Anthurium andraeanum (Araceae) | flamingo lily | NOT native to Hawaii | ?unresearched | ?unresearched |
| Anthurium andreanum (Araceae) | (unresearched) | ?unresearched | ?unresearched | |
| Antidesma platyphyllum (Euphorbiaceae) | hame | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Antidesma platyphyllum var. hillebrandii (Euphorbiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Antidesma platyphyllum var. platyphyllum (Euphorbiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Antidesma pulvinatum (Euphorbiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Antigonon leptopus (Polygonaceae) | bride's tears, chain-of-love, Confederate vine, coral bells, coral vine, coralita, corallita, hearts on a chain, love-vine, Mexican creeper, Mexican love vine, mountain rose, queen's jewels | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Antirrhinum majus (Scrophulariaceae) | snapdragon | NOT native to Hawaii | ?unresearched | ?unresearched |
| Antirrhinum orontium (Scrophulariaceae) | lesser snapdragon | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Antithamnion pectinatum (Ceramiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Antithamnionella spirographidis (Ceramiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Antithamnionella ternifolia (Ceramiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Apera interrupta (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Aphanes arvensis (Rosaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Aphanes microcarpa (Rosaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Aphanothece naegelii (Chroococcaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Apium graveolens (Apiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Apium nodiflorum (Apiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Apium tenuifolium (Apiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Aponogeton desertorum (Aponogetonaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Aponogeton distachyos (Aponogetonaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Aponogeton junceus subsp. junceus (Aponogetonaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Aptenia cordifolia (Aizoaceae) | baby sun rose, dew plant, heartleaf iceplant, red apple, rock rose | NOT native to Hawaii | ?unresearched | ?unresearched |
| Aquilegia caucasica (Ranunculaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Aquilegia vulgaris (Ranunculaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Arachis glabrata (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Arachis pintoi (Fabaceae) | golden glory, ornamental ground peanut | NOT native to Hawaii | ?unresearched | ?unresearched |
| Arachniodes insularis (Drynariaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Araiostegia pseudocystopteris (Davalliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Aralia elata (Araliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Aralia spinosa (Araliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Araucaria columnaris (Araucariaceae) | Cook pine | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Araucaria cunninghamii (Araucariaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Araucaria heterophylla (Araucariaceae) | Norfolk Island pine | NOT native to Hawaii | ?unresearched | ?unresearched |
| Araujia hortorum (Asclepiadaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Araujia sericifera (Asclepiadaceae) | bladder flower, cruelplant, moth catcher, moth plant, white bladder flower | NOT native to Hawaii | ?unresearched | ?unresearched |
| Arbutus unedo (Ericaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Archontophoenix alexandrae (Arecaceae) | Alexander palm, Alexandra palm, king palm, northern bungalow palm | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Archontophoenix cunninghamiana (Arecaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Archontophoenix sp. (Arecaceae) | Alexander palm | NOT native to Hawaii | PRESENT in Hawaii | ?unknown |
| Archontophoenix tuckeri (Arecaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Arctium lappa (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Arctium minus (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Arctostaphylos insularis (Ericaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Arctotheca calendula (Asteraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Arctotheca nivea (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Arctotheca populifolia (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Arctotheca prostrata (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Arctotis stoechadifolia (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Arctotis venusta (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ardisia crenata (Myrsinaceae) | Australian holly, coral ardisia, coral berry, hen's eyes, Hilo holly, scratchthroat, spiceberry | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Ardisia crenulata (Myrsinaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Ardisia crispa (Myrsinaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Ardisia elliptica (Myrsinaceae) | duck's eye, shoebutton ardisia | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Ardisia escallonioides (Myrsinaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ardisia humilis (Myrsinaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Ardisia nigrescens (Myrsinaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ardisia solanacea (Myrsinaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Ardisia spp. (Myrsinaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Areca ridleyana (Arecaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Areca triandra (Arecaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Arecastrum romanzoffianum (Arecaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Arenaria interpres (Caryophyllaceae) | akekeke, ruddy turnstone | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Arenaria leptoclados (Caryophyllaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Arenaria serpyllifolia (Caryophyllaceae) | thyme-leaved sandwort | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Arenaria serpyllifolia subsp. serpyllifolia (Caryophyllaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Arenga pinnata (Arecaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Argemone glauca (Papaveraceae) | pua kala | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Argemone glauca var. decipiens (Papaveraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Argemone glauca var. glauca (Papaveraceae) | pua kala | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Argemone mexicana (Papaveraceae) | Mexican poppy, Mexican prickly-poppy, prickly poppy, yellow thistle | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Argemone ochroleuca (Papaveraceae) | Mexican poppy, pale Mexican poppy, prickly poppy, white thistle, yellow poppy | NOT native to Hawaii | ?unresearched | ?unresearched |
| Argemone ochroleuca subsp. ochroleuca (Papaveraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Argemone subfusiformis (Papaveraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Argyranthemum foeniculaceum (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Argyranthemum frutescens (Asteraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Argyranthemum sp. (Asteraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Argyreia nervosa (Convolvulaceae) | baby wood rose, elephant climber, elephant creeper, elephant vine, Hawaiian baby woodrose, silver morning glory, wood rose, woolly morning glory | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Argyroxiphium caliginis (Asteraceae) | Eke silversword | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Argyroxiphium grayanum (Asteraceae) | greensword | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Argyroxiphium kauense (Asteraceae) | ahinahina, Kau silversword | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Argyroxiphium sandwicense (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Argyroxiphium sandwicense subsp. macrocephalum (Asteraceae) | ahinahina, Haleakala silversword, hinahina | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Argyroxiphium sandwicense subsp. sandwicense (Asteraceae) | ahinahina, hinahina, Mauna Kea silversword | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Argyroxiphium virescens (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Argyroxiphium x Dubautia sp. (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Arisarum vulgare (Araceae) | (unresearched) | ?unresearched | ?unresearched | |
| Aristea ecklonii (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Aristida adscensionis (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Aristolochia durior (Aristolochiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Aristolochia elegans (Aristolochiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Aristolochia littoralis (Aristolochiaceae) | calico flower, Dutchman's pipe | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Aristolochia macrophylla (Aristolochiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Aristolochia odoratissima (Aristolochiaceae) | duck, swan | NOT native to Hawaii | ?unresearched | ?unresearched |
| Aristolochia ringens (Aristolochiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Arnebia pulchra (Boraginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Aronia melanocarpa (Rosaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Aronia x prunifolia (Rosaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Arrhenatherum elatius (Poaceae) | arrhenatherum | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Arrhenatherum elatius var. bulbosum (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Artabotrys hexapetalus (Annonaceae) | climbing ilang-ilang, climbing ylang-ylang, lanalana, lanalana, ylang-ylang | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Artemisia absinthium (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Artemisia annua (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Artemisia arborescens (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Artemisia australis (Asteraceae) | ahinahina, hinahina, hinahina kuahiwi | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Artemisia kauaiensis (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Artemisia ludoviciana (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Artemisia mauiensis (Asteraceae) | ahinahina, hinahina | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Artemisia mauiensis var. diffusa (Asteraceae) | ahinahina, hinahina | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Artemisia stelleriana (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Artemisia verlotiorum (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Artemisia vulgaris (Asteraceae) | common wormwood, hiya, mugwort | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Arthraxon hispidus (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Arthrostemma ciliatum (Melastomataceae) | arthrostemma, everblooming eavender | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Artocarpus altilis (Moraceae) | breadfruit, breadnut, ‘ulu | NOT native to Hawaii | ?unresearched | ?unresearched |
| Artocarpus camansi (Moraceae) | breadnut | (unresearched) | ?unresearched | ?unresearched |
| Artocarpus communis (Moraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Artocarpus heterophyllus (Moraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Artocarpus mariannensis (Moraceae) | dugdug | (unresearched) | ?unresearched | ?unresearched |
| Artocarpus odoratissimus (Moraceae) | marang | NOT native to Hawaii | ?unresearched | ?unresearched |
| Arum italicum (Araceae) | (unresearched) | ?unresearched | ?unresearched | |
| Aruncus dioicus (Rosaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Arundina graminifolia (Orchidaceae) | bamboo orchid | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Arundinaria gigantea (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Arundinaria graminea (Poaceae) | bamboo | NOT native to Hawaii | ?unresearched | ?unresearched |
| Arundinaria spp. (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Arundo donax (Poaceae) | giant reed, Spanish reed, wild cane | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Arundo donax var. donax (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Asarum delavayi (Aristolochiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ascarina lucida (Chloranthaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Asclepias curassavica (Asclepiadaceae) | bastard ipecac, bloodflower, bloodflower milkweed, butterfly weed, false ipecac, lauhele, laulele, milkweed, nu‘umela, nuumela, pua ‘anuhe, pua anuhe, red cotton bush | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Asclepias incarnata (Asclepiadaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Asclepias physocarpa (Asclepiadaceae) | balloon plant | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Asclepias syriaca (Asclepiadaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Aseroe rubra (Clathraceae) | starfish stinkhorn | (unresearched) | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Asparagopsis armata (Bonnemaisoniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Asparagopsis taxiformis (Bonnemaisoniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Asparagus aethiopicus (Liliaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Asparagus aethiopicus cv. Sprengeri (Liliaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Asparagus africanus (Liliaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Asparagus asparagoides (Liliaceae) | bridal creeper, bridal-veil creeper, gnarboola, smilax, smilax asparagus | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Asparagus declinatus (Liliaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Asparagus densiflorus (Liliaceae) | asparagus fern, coarse asparagus fern, regal fern, smilax, Sprenger's asparagus fern, sprengeri fern | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Asparagus falcatus (Liliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Asparagus myriocladus (Liliaceae) | zigzag asparagus | NOT native to Hawaii | ?unresearched | ?unresearched |
| Asparagus officinalis (Liliaceae) | asparagus, garden asparagus | NOT native to Hawaii | ?unresearched | ?unresearched |
| Asparagus plumosus (Liliaceae) | asparagus fern | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Asparagus scandens (Liliaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Asparagus setaceus (Liliaceae) | asparagus fern, climbing asparagus fern, ferm asparagus, lace fern, lacy asparagus fern, ornamental asparagus, plumosa | NOT native to Hawaii | ?unresearched | ?unresearched |
| Asparagus virgatus (Liliaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Asperugo procumbens (Boraginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Asphodelus fistulosus (Asphodelaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Aspidistra patentiloba (Liliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Asplenium acuminatum (Aspleniaceae) | lola | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Asplenium adiantum-nigrum (Aspleniaceae) | iwaiwa | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Asplenium aethiopicum (Aspleniaceae) | iwaiwa a Kane | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Asplenium contiguum (Aspleniaceae) | asplenium | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Asplenium contiguum var. contiguum (Aspleniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Asplenium contiguum var. hirtulum (Aspleniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Asplenium excisum (Aspleniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Asplenium glabratum (Aspleniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Asplenium haleakalense (Aspleniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Asplenium hobdyi (Aspleniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Asplenium horridum (Aspleniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Asplenium horridum var. glabratum (Aspleniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Asplenium horridum var. horridum (Aspleniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Asplenium insiticium (Aspleniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Asplenium kaulfussii (Aspleniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Asplenium kaulfussii f. bipinnatum (Aspleniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Asplenium kaulfussii f. dareoides (Aspleniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Asplenium kaulfussii f. gemmiparum (Aspleniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Asplenium kaulfussii f. kaulfussii (Aspleniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Asplenium lobulatum (Aspleniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Asplenium macraei (Aspleniaceae) | iwaiwa lau lii | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Asplenium monanthes (Aspleniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Asplenium nidus (Aspleniaceae) | ekaha | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Asplenium normale (Aspleniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Asplenium pellucidum (Aspleniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Asplenium peruvianum var. insulare (Aspleniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Asplenium polyodon (Aspleniaceae) | punana manu | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Asplenium schizophyllum (Aspleniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Asplenium sp. (Aspleniaceae) | asplenium | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Asplenium sphenotomum (Aspleniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Asplenium trichomanes (Aspleniaceae) | maidenhair spleenwort | (unresearched) | ?unresearched | ?unresearched |
| Asplenium trichomanes subsp. densum (Aspleniaceae) | maidenhair spleenwort | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Asplenium unilaterale (Aspleniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Asplenium x flagrum (Aspleniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Asplenium x kokeense (Aspleniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Asplenium x sphenocookii (Aspleniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Asplenium x waikamoi (Aspleniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Asplenium x_flagrum (Aspleniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Asplenium x_kokeense (Aspleniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Asplenium x_sphenocookii (Aspleniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Asplenium x_waikamoi (Aspleniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Aspris caryophyllea (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Astelia argyrocoma (Liliaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Astelia menziesiana (Liliaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Astelia waialealae (Liliaceae) | pa'iniu | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Aster hybridus (Asteraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Aster laevis (Asteraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Aster lanceolatus (Asteraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Aster novae-angliae (Asteraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Aster novi-belgii (Asteraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Aster oharai (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Aster spp. (Asteraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Aster squamatus (Asteraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Aster subulatus (Asteraceae) | annual saltmarsh aster | NOT native to Hawaii | ?unresearched | ?unresearched |
| Aster tradescantii (Asteraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Aster x salignus (Asteraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Asterina anomala (Asterinaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Asterolinon linum-stellatum (Myrsinaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Asteronema breviarticulatum (Ectocarpaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Asteropsis carinifera (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Asystasia gangetica (Acanthaceae) | asystasia, Chinese violet, coromandel, Philippine violet | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Asystasia sp. (Acanthaceae) | asystasia | NOT native to Hawaii | ?unresearched | ?unresearched |
| Athyrium microphyllum (Athyriaceae) | akolea | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Atriplex hortensis (Chenopodiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Atriplex lentiformis (Chenopodiaceae) | lens scale, quailbush, tree atriplex | NOT native to Hawaii | ?unresearched | ?unresearched |
| Atriplex patula (Chenopodiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Atriplex prostrata (Chenopodiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Atriplex rosea (Chenopodiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Atriplex semibaccata (Chenopodiaceae) | Australian saltbush | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Atriplex suberecta (Chenopodiaceae) | saltbush | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Atropa belladonna (Solanaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Atylosia scarabaeoides (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Auricularia polytricha (Auriculariaceae) | (unresearched) | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Austrocylindropuntia cylindrica (Cactaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Austroeupatorium inulaefolium (Asteraceae) | (no common names known by PIER) | (unresearched) | ?unresearched | ?unresearched |
| Austroeupatorium inulifolium (Asteraceae) | austroeupatorium | NOT native to Hawaii | ?unresearched | ?unresearched |
| Avellinia michelii (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Avena barbata (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Avena fatua (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Avena sativa (Poaceae) | oat, ‘oka | (unresearched) | ?unresearched | ?unresearched |
| Avena spp. (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Avena sterilis (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Avena sterilis subsp. ludoviciana (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Avena sterilis subsp. sterilis (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Avena strigosa (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Averrhoa bilimbi (Oxalidaceae) | bilimbi, cucumber tree, tree cucumber, tree sorrel | NOT native to Hawaii | ?unresearched | ?unresearched |
| Averrhoa carambola (Oxalidaceae) | carambola | NOT native to Hawaii | ?unresearched | ?unresearched |
| Avrainvillea amadelpha (Udoteaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Axonopus affinis (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Axonopus compressus (Poaceae) | American carpet grass, blanket grass, broadleaf carpet grass, carpet grass, lawn grass, Louisiana grass, tropical carpet grass, wide-leaved carpetgrass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Axonopus fissifolius (Poaceae) | caratao grass, carpet grass, common carpet grass, narrow-leaved carpetgrass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Axonopus micay (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Azadirachta indica (Meliaceae) | Indian lilac, margosa, neem, nim | NOT native to Hawaii | ?unresearched | ?unresearched |
| Azolla filiculoides (Azollaceae) | azolla, large mosquito fern | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Azolla filiculoides var. rubra (Azollaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Azolla imbricata (Azollaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Azolla pinnata (Azollaceae) | feathered waterfern, ferny azolla, mosquito fern, water velvet | NOT native to Hawaii | ?unresearched | ?unresearched |
| Azolla rubra (Azollaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Azolla spp. (Azollaceae) | mosquito fern | NOT native to Hawaii | ?unresearched | ?unresearched |
| Babiana angustifolia (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Babiana nana (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Babiana stricta (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Babiana tubulosa (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Babiana tubulosa var. tubiflora (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Baccharis halimifolia (Asteraceae) | consumption weed, eastern baccharis, groundsel bush, groundsel tree, Sea Island myrtle, sea myrtle, silverling, tree groundsel, waterbrush | NOT native to Hawaii | ?unresearched | ?unresearched |
| Bacidia medialis (Bacidiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bacopa caroliniana (Scrophulariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bacopa egensis (Scrophulariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bacopa monnieri (Scrophulariaceae) | aeae | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Bacopa procumbens (Scrophulariaceae) | baby jump-up | NOT native to Hawaii | ?unresearched | ?unresearched |
| Bacopa rotundifolia (Scrophulariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bactris gasipaes (Arecaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Baeckea virgata (Myrtaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Baeometra uniflora (Colchicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bakeridesia integerrima (Malvaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Baldwiniella kealeensis (Neckeraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Baldwiniella sandwicensis (Neckeraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ballota nigra subsp. foetida (Lamiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bambusa balcooa (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bambusa guadua (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bambusa multiplex (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Bambusa sp. (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bambusa spp. (Poaceae) | bamboo | NOT native to Hawaii | ?unresearched | ?unresearched |
| Bambusa ventricosa (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Bambusa vulgaris (Poaceae) | common bamboo | NOT native to Hawaii | ?unresearched | ?unresearched |
| Bangia atropurpurea (Bangiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Banksia caleyi (Proteaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Banksia integrifolia (Proteaceae) | coast banksia | NOT native to Hawaii | ?unresearched | ?unresearched |
| Banksia menziesii (Proteaceae) | banksia | NOT native to Hawaii | ?unresearched | ?unresearched |
| Banksia sp. (Proteaceae) | Menzies banksia | NOT native to Hawaii | ?unresearched | ?unresearched |
| Banksia spp. (Proteaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Barbarea intermedia (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Barbarea orthoceras (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Barbarea sp. (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Barbarea verna (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Barbarea vulgaris (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Barbella trichophora (Meteoriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Barbellopsis trichophora (Meteoriaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Barbula indica (Pottiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Barleria cristata (Acanthaceae) | bluebell barleria, crested Philippine violet, Philippine violet | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Barleria cristata cv. Rosea (Acanthaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Barleria lupulina (Acanthaceae) | hophead, Philippine violet | NOT native to Hawaii | ?unresearched | ?unresearched |
| Barleria prionitis (Acanthaceae) | barleria, porcupine flower | NOT native to Hawaii | ?unresearched | ?unresearched |
| Barleria repens (Acanthaceae) | barleria | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Barleria spp. (Acanthaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Barleria strigosa (Acanthaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Barringtonia asiatica (Lecythidaceae) | barringtonia, hotu, hutu, shaving brush tree | NOT native to Hawaii | ?unresearched | ?unresearched |
| Barringtonia procera (Lecythidaceae) | cutnut | (unresearched) | ?unresearched | ?unresearched |
| Bartlettina sordida (Asteraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Bartramia baldwinii (Bartramiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Bartramia halleriana (Bartramiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Bartramia mauiensis (Bartramiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bartramia norvegica (Bartramiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bartsia trixago (Orobanchaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Basella alba (Basellaceae) | Ceylon spinach, Indian spinach, ‘īnika, Malabar nightshade, Malabar spinach, vine spinach | NOT native to Hawaii | ?unresearched | ?unresearched |
| Bassia hyssopifolia (Chenopodiaceae) | bassia | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Bassia scoparia (Chenopodiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Batis maritima (Bataceae) | akulikuli kai, pickleweed | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Batrachium trichophyllum (Ranunculaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Batrachochytrium dendrobatidis (Fungi) | amphibian chytrid, chytrid fungus | NOT native to Hawaii | ?unresearched | ?unresearched |
| Bauhinia acuminata (Fabaceae) | dwarf white bauhinia | NOT native to Hawaii | ?unresearched | ?unresearched |
| Bauhinia binata (Fabaceae) | bauhinia | (unresearched) | ?unresearched | ?unresearched |
| Bauhinia blakeana (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bauhinia divaricata (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bauhinia galpinii (Fabaceae) | pride of the Cape | NOT native to Hawaii | ?unresearched | ?unresearched |
| Bauhinia monandra (Fabaceae) | mariposa, Napoleon's plume, orchid tree, pink bauhinia, pink butterfly tree, St. Thomas-tree | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Bauhinia natalensis (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bauhinia purpurea (Fabaceae) | bauhinia, butterfly tree, orchid tree, pink butterfly tree, purple bauhinia, purple butterfly tree, purple orchid tree | NOT native to Hawaii | ?unresearched | ?unresearched |
| Bauhinia sp. (Fabaceae) | bauhinia | NOT native to Hawaii | ?unresearched | ?unresearched |
| Bauhinia variegata (Fabaceae) | bauhinia, butterfly tree, mountain ebony, orchid tree, purple orchid tree, white bauhinia | NOT native to Hawaii | ?unresearched | ?unresearched |
| Bazzania praerupta (Lepidoziaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Beaumontia grandiflora (Apocynaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Beccariophoenix madagascariensis (Arecaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Beckmannia syzigachne (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Beesia calthaefolia (Ranunculaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Begonia cucullata (Begoniaceae) | clubed begonia | NOT native to Hawaii | ?unresearched | ?unresearched |
| Begonia foliosa (Begoniaceae) | fuchsia begonia | NOT native to Hawaii | ?unresearched | ?unresearched |
| Begonia fusca (Begoniaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Begonia hirtella (Begoniaceae) | begonia, Brazilian begonia | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Begonia maculata (Begoniaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Begonia odorata (Begoniaceae) | begonia | NOT native to Hawaii | ?unresearched | ?unresearched |
| Begonia rex (Begoniaceae) | king begonia, painted-leaf begonia, rex begonia | NOT native to Hawaii | ?unresearched | ?unresearched |
| Begonia semperflorens-cultorum (Begoniaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Begonia sp. (Begoniaceae) | begonia | NOT native to Hawaii | ?unresearched | ?unresearched |
| Begonia vitifolia (Begoniaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Begonia x semperflorens-cultorum (Begoniaceae) | bedding begonia, perpetual begonia, wax begonia | NOT native to Hawaii | ?unresearched | ?unresearched |
| Begonia x_semperflorens-cultorum (Begoniaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Beilschmiedia tarairi (Lauraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bellardia trixago (Orobanchaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bellis perennis (Asteraceae) | daisy, English daisy, lawn daisy | (unresearched) | ?unresearched | ?unresearched |
| Berberis aristata (Berberidaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Berberis darwinii (Berberidaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Berberis glaucocarpa (Berberidaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Berberis iberica (Berberidaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Berberis japonica (Berberidaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Berberis sp. (Berberidaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Berberis thunbergii (Berberidaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Berberis vulgaris (Berberidaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Berchemia zeyheri (Rhamnaceae) | pau-rosa, pink ivory, red ivory, red ivorywood | NOT native to Hawaii | ?unresearched | ?unresearched |
| Berkheya rigida (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Berteroa incana (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Berula erecta (Apiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Besleria laxiflora (Gesneriaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Beta vulgaris (Chenopodiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Beta vulgaris subsp. maritima (Chenopodiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Betula lenta (Betulaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Betula nigra (Betulaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Betula pendula (Betulaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Betula pubescens (Betulaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Biddulphia biddulphiana (Coscinodiscineae) | (unresearched) | ?unresearched | ?unresearched | |
| Biddulphia laevis (Coscinodiscineae) | (unresearched) | ?unresearched | ?unresearched | |
| Biddulphiopsis titiana (Biddulphiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bidens alba (Asteraceae) | beggar's tick, beggartick, burr marigold, cobbler's pegs, romerillo, Spanish needle | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Bidens alba var. radiata (Asteraceae) | beggartick | NOT native to Hawaii | ?unresearched | ?unresearched |
| Bidens amplectens (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Bidens asymmetrica (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Bidens beckii (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bidens bipinnata (Asteraceae) | bipinnate beggar's tick, cobbler's pegs, Spanish needle | NOT native to Hawaii | ?unresearched | ?unresearched |
| Bidens campylotheca (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bidens campylotheca subsp. campylotheca (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Bidens campylotheca subsp. pentamera (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Bidens campylotheca subsp. waihoiensis (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Bidens cernua (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bidens cervicata (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Bidens comosa (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bidens conjuncta (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Bidens cosmoides (Asteraceae) | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Bidens cynapiifolia (Asteraceae) | beggar's tick, blue bidens | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Bidens forbesii (Asteraceae) | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Bidens forbesii subsp. forbesii (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Bidens forbesii subsp. kahiliensis (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Bidens frondosa (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bidens hawaiensis (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Bidens hillebrandiana (Asteraceae) | kookoolau | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Bidens hillebrandiana subsp. hillebrandiana (Asteraceae) | ko'oko'olau | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Bidens hillebrandiana subsp. polycephala (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Bidens macrocarpa (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Bidens mauiensis (Asteraceae) | kookoolau | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Bidens menziesii (Asteraceae) | kookoolau | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Bidens menziesii subsp. filiformis (Asteraceae) | kookoolau | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Bidens menziesii subsp. menziesii (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Bidens menziesii x mauiense (Asteraceae) | kookoolau hybrid | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Bidens micrantha (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Bidens micrantha subsp. ctenophylla (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Bidens micrantha subsp. kalealaha (Asteraceae) | kookoolau | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Bidens micrantha subsp. micrantha (Asteraceae) | kookoolau | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Bidens molokaiensis (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Bidens pilosa (Asteraceae) | beggar's tick, broom stick, broom stuff, cobbler's pegs, devil's needles, kī, ki, kī nehe, ki nehe, kī pipili, ki pipili, nehe, Spanish needle, spanish needle | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Bidens pilosa var. pilosa (Asteraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Bidens polylepis (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bidens populifolia (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Bidens sandvicensis (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bidens sandvicensis subsp. confusa (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Bidens sandvicensis subsp. sandvicensis (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Bidens torta (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Bidens tripartita (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bidens valida (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Bidens wiebkei (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Bikkia tetrandra (Rubiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Billardiera heterophylla (Pittosporaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Billbergia pyramidalis (Bromeliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bischofia javanica (Euphorbiaceae) | bischofia, bishopwood, Javanese bishopwood | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Bismarckia nobilis (Arecaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Bixa orellana (Bixaceae) | ‘alaea, alaea, ‘alaea la‘au, alaea laau, annato, annatto, arnatto, kūmauna, kumauna, lipstick tree | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Blainvillea gayana (Asteraceae) | (no common names known by PIER) | NOT native to Hawaii | ?unresearched | ?unresearched |
| Blastophysa rhizopus (Chaetosiphonaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Blechnum appendiculatum (Blechnaceae) | blechnum | NOT native to Hawaii | ?unresearched | ?unresearched |
| Blechnum brasiliense (Blechnaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Blechnum gibbum (Blechnaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Blechnum occidentale (Blechnaceae) | hammock fern, New World midsorus fern | (unresearched) | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Blechnum orientale (Blechnaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Blechum pyramidata (Acanthaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Blechum pyramidatum (Acanthaceae) | blackweed, blechum, Browne's blechum, green shrimp plant | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Blighia sapida (Sapindaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Blumea laciniata (Asteraceae) | cutleaf false oxtongue | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Blyxa aubertii (Hydrocharitaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Blyxa aubertii var. echinosperma (Hydrocharitaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Blyxa japonica (Hydrocharitaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bobea brevipes (Rubiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Bobea elatior (Rubiaceae) | ahakea | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Bobea sandwicensis (Rubiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Bobea timonioides (Rubiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Bocconia frutescens (Papaveraceae) | bocconia, parrotweed, plume poppy, tree celandine, tree poppy | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Boehmeria grandis (Urticaceae) | akolea | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Boehmeria macrophylla (Urticaceae) | African jolanettle, false nettle | NOT native to Hawaii | ?unresearched | ?unresearched |
| Boehmeria nivea (Urticaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Boerhavia acutifolia (Nyctaginaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Boerhavia coccinea (Nyctaginaceae) | boerhavia, hog feed, hogweed, red spiderling, scarlet spiderling, tar vine, wineflower | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Boerhavia erecta (Nyctaginaceae) | erect boerhavia, erect spiderling | NOT native to Hawaii | ?unresearched | ?unresearched |
| Boerhavia glabrata (Nyctaginaceae) | alena | (unresearched) | ?unresearched | ?unresearched |
| Boerhavia herbstii (Nyctaginaceae) | alena | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Boerhavia repens (Nyctaginaceae) | alena | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Boerhavia schomburgkiana (Nyctaginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Boerhavia sp. (Nyctaginaceae) | alena | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Bolboschoenus caldwellii (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bolboschoenus fluviatilis (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bolboschoenus maritimus (Cyperaceae) | kaluha | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Bolboschoenus maritimus subsp. paludosus (Cyperaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Bomarea multiflora (Liliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bombax ceiba (Bombacaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Bonamia menziesii (Convolvulaceae) | bonamia | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Bonnemaisonia hamifera (Bonnemaisoniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Boodlea composita (Siphonocladaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Boodlea montagnei (Siphonocladaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Borago officinalis (Boraginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bornetella sphaerica (Dasycladaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Borreria verticillata (Rubiaceae) | shrubby false-buttonweed | NOT native to Hawaii | ?unresearched | ?unresearched |
| Bothriochloa barbinodis (Poaceae) | fuzzy top | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Bothriochloa bladhii (Poaceae) | airport grass, Australian beadgrass, Australian bluestem, blue grass, Caucasian bluestem, forest bluegrass, plains bluegrass, purple plume grass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Bothriochloa decipiens (Poaceae) | pitted bluegrass | NOT native to Hawaii | ?unresearched | ?unresearched |
| Bothriochloa insculpta (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bothriochloa ischaemum (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bothriochloa ischaemum var. songarica (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bothriochloa laguroides (Poaceae) | beardgrass | NOT native to Hawaii | ?unresearched | ?unresearched |
| Bothriochloa pertusa (Poaceae) | hurricane grass, Indian couch grass, pitted beardgrass, pitted bluestem | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Bothriochloa saccharoides (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bothriochloa sp. (Poaceae) | beargrass | NOT native to Hawaii | ?unresearched | ?unresearched |
| Bothriochloa spp. (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Botryocladia skottsbergii (Rhodymeniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Botryocladia tenuissima (Rhodymeniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bougainvillea buttiana (Nyctaginaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Bougainvillea glabra (Nyctaginaceae) | bougainvillea | NOT native to Hawaii | ?unresearched | ?unresearched |
| Bougainvillea sp. (Nyctaginaceae) | bougainvillea | NOT native to Hawaii | ?unresearched | ?unresearched |
| Bougainvillea spectabilis (Nyctaginaceae) | bougainvillea, great bougainvillea, purple bougainvillea | NOT native to Hawaii | ?unresearched | ?unresearched |
| Bougainvillea spp. (Nyctaginaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Boussingaultia cordifolia (Basellaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bouteloua aristidoides (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bouteloua disticha (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Brachiaria brizantha (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Brachiaria decumbens (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Brachiaria decumbens cv. Basilisk (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Brachiaria eruciformis (Poaceae) | sweet signal grass | NOT native to Hawaii | ?unresearched | ?unresearched |
| Brachiaria humidicola (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Brachiaria mutica (Poaceae) | California grass | NOT native to Hawaii | ?unresearched | ?unresearched |
| Brachiaria paspaloides (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Brachiaria plantaginea (Poaceae) | brachiaria | NOT native to Hawaii | ?unresearched | ?unresearched |
| Brachiaria ramosa (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Brachiaria subquadripara (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Brachychiton acerifolius (Sterculiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Brachychiton bidwillii (Sterculiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Brachychiton carruthersii (Sterculiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Brachychiton populneus (Sterculiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Brachychiton populneus subsp. populneus (Sterculiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Brachycome multifida (Asteraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Brachymenium exile (Bryaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Brachymenium indicum (Bryaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Brachypodium distachyon (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Brachypodium pinnatum (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Brachypodium sylvaticum (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Brachythecium hawaiicum (Brachytheciaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Brachythecium lamprocarpum (Brachytheciaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Brachythecium plumosum (Brachytheciaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Brachythecium rutabulum (Brachytheciaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Bracteantha bracteata (Asteraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Brasenia schreberi (Nymphaeaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Brassica alba (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Brassica arvensis (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Brassica barrelieri subsp. oxyrrhina (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Brassica campestris subsp. chinensis (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Brassica fruticulosa (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Brassica hirta (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Brassica juncea (Brassicaceae) | brown mustard, Chinese mustard, India mustard, Indian mustard, mustard, mustard cabbage, Oriental mustard | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Brassica kaber (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Brassica napus (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Brassica nigra (Brassicaceae) | black mustard, makeke | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Brassica oleracea (Brassicaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Brassica rapa (Brassicaceae) | birdsrape mustard, colbaga, turnip, tyfon, wild turnip | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Brassica rapa subsp. sylvestris (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Brassica spp. (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Brassica tournefortii (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Breutelia affinis (Bartramiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Breutelia arundinifolia (Bartramiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Breutelia crassicaulis (Bartramiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Breutilia crassicaulis (Bartramiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Brexia madagascariensis (Grossulariaceae) | brexia | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Breynia disticha (Euphorbiaceae) | foliage-flower, leaf-flower of the Pacific Islands, snowbush, snowbush breynia, summer snow, sweetpea bush | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Breynia disticha var. rosi-picta (Euphorbiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Brickellia californica (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Brickellia diffusa (Asteraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Brighamia insignis (Campanulaceae) | alula, haha, olulu, pu aupaka | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Brighamia rockii (Campanulaceae) | alula, haha, pua ala | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Brighamia sp. (Campanulaceae) | brighamia | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Brillantaisia lamium (Acanthaceae) | (no common names known by PIER) | NOT native to Hawaii | ?unresearched | ?unresearched |
| Briza maxima (Poaceae) | big quaking grass | NOT native to Hawaii | ?unresearched | ?unresearched |
| Briza minor (Poaceae) | little quaking grass | NOT native to Hawaii | ?unresearched | ?unresearched |
| Bromelia pinguin (Bromeliaceae) | pinguin, wild pine | (unresearched) | ?unresearched | ?unresearched |
| Bromeliaceae spp. (Bromeliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bromus arvensis (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Bromus brizaeformis (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Bromus briziformis (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Bromus catharticus (Poaceae) | rescue grass | NOT native to Hawaii | ?unresearched | ?unresearched |
| Bromus cebadilla (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Bromus commutatus (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Bromus diandrus (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Bromus diandrus var. rigidus (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Bromus erectus (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Bromus hordeaceus (Poaceae) | soft chess | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Bromus hordeaceus subsp. hordeaceus (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Bromus inermis (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Bromus japonicus (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Bromus japonicus var. japonicus (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Bromus japonicus var. vestitus (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Bromus lanceolatus (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Bromus lithobius (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Bromus madritensis (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Bromus madritensis subsp. rubens (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Bromus mollis (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Bromus racemosus subsp. commutatus (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Bromus rigidus (Poaceae) | ripgut grass | NOT native to Hawaii | ?unresearched | ?unresearched |
| Bromus rigidus subsp. gussonei (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Bromus rubens (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Bromus secalinus (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Bromus spp. (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Bromus squarrosus (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Bromus stamineus (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Bromus sterilis (Poaceae) | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Bromus tectorum (Poaceae) | cheat grass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Bromus vulgaris (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Bromus willdenowii (Poaceae) | rescue grass | NOT native to Hawaii | ?unresearched | ?unresearched |
| Brotherella opaeodon (Sematophyllaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Broussaisia arguta (Hydrangeaceae) | kanawao | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Broussonetia luzonica (Moraceae) | alakon | NOT native to Hawaii | ?unresearched | ?unresearched |
| Broussonetia papyrifera (Moraceae) | wauke | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Browallia americana (Solanaceae) | bush violet | NOT native to Hawaii | ?unresearched | ?unresearched |
| Brucea javanica (Simaroubaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Brugmansia candida (Solanaceae) | angel's trumpet, borrachero, nānāhonua, white angel's-trumpet | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Brugmansia suaveolens (Solanaceae) | angel's trumpet, night bells, trumpet flower | NOT native to Hawaii | ?unresearched | ?unresearched |
| Brugmansia versicolor (Solanaceae) | peach angel's-trumpet | (unresearched) | ?unresearched | ?unresearched |
| Brugmansia x candida (Solanaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Bruguiera gymnorrhiza (Rhizophoraceae) | NOT native to Hawaii | PRESENT in Hawaii | ?unresearched | |
| Brunfelsia australis (Solanaceae) | yesterday today and tomorrow plant | NOT native to Hawaii | ?unresearched | ?unresearched |
| Brunfelsia grandiflora (Solanaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Brunfelsia pauciflora var. calycina (Solanaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Brunfelsia sp. (Solanaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Bryoerythrophyllum recurvirostre (Pottiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Bryohaplocladium microphyllum (Leskeaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Bryonia alba (Cucurbitaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bryonia dioica (Cucurbitaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bryophyllum beauverdii (Crassulaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Bryophyllum daigremontianum (Crassulaceae) | devil's backbone, Mexican hat plant, mother of millions | NOT native to Hawaii | ?unresearched | ?unresearched |
| Bryophyllum daigremontianum x delagoense (Crassulaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Bryophyllum delagoense (Crassulaceae) | chandelier plant, friendly neighbor, mother of thousands | NOT native to Hawaii | ?unresearched | ?unresearched |
| Bryophyllum fedtschenkoi (Crassulaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Bryophyllum gastonis-bonnieri (Crassulaceae) | donkey ears, palm beachbells | NOT native to Hawaii | ?unresearched | ?unresearched |
| Bryophyllum pinnatum (Crassulaceae) | air plant, Canterbury bells, cathedral bells, life plant, Mexican love plant, miracle plant, ‘oliwa ku kahakai, resurrection plant | NOT native to Hawaii | ?unresearched | ?unresearched |
| Bryophyllum spp. (Crassulaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Bryopsis hypnoides (Bryopsidaceae) | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Bryopsis pennata (Bryopsidaceae) | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Bryopsis pennata f. secunda (Bryopsidaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bryopsis spp. (Bryopsidaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bryoria furcellata (Parmeliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bryoria smithii (Parmeliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bryum argenteum (Bryaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Bryum atrovirens (Bryaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Bryum baldwinii (Bryaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Bryum caespiticium (Bryaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Bryum chrysoneuron (Bryaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Bryum conicum (Bryaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Bryum crassicostatum (Bryaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bryum decaisnei (Bryaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bryum erythrocarpum (Bryaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bryum hawaiicum (Bryaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Bryum lisae (Bryaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bryum mauiense (Bryaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bryum megalostegium (Bryaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bryum mildeanum (Bryaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Bryum pseudocapillare (Bryaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bucida buceras (Combretaceae) | jucaro | NOT native to Hawaii | ?unresearched | ?unresearched |
| Buckiella draytonii (Hypnaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Buddleja alternifolia (Buddlejaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Buddleja asiatica (Buddlejaceae) | dog tail, huelo ‘ilio, huelo ilio | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Buddleja davidii (Buddlejaceae) | buddleia, butterfly bush, orange eye, summer lilac | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Buddleja dysophylla (Buddlejaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Buddleja lindleyana (Buddlejaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Buddleja madagascariensis (Buddlejaceae) | butterfly bush, smoke bush | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Buddleja officinalis (Buddlejaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Buellia aeruginascens (Physciaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Buellia proximata (Physciaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Buellia tincta (Physciaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Buglossoides arvensis (Boraginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bulbostylis barbata (Cyperaceae) | hair sedge | (unresearched) | ?unresearched | ?unresearched |
| Bulbostylis densa (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bulbostylis striatella (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bulweria bulwerii (Bignoniaceae) | Bulwer petrel, Bulwer's petrel | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Bulweria fallax (Bignoniaceae) | Jouanin petrel | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Bunias orientalis (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bupleurum rotundifolium (Apiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bupleurum semicompositum (Apiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Burnatia enneandra (Alismataceae) | (unresearched) | ?unresearched | ?unresearched | |
| Bursera simaruba (Burseraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Butea monosperma (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Butomus umbellatus (Butomaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Buxus sempervirens (Buxaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cabomba caroliniana (Cabombaceae) | cabomba, Carolina fanwort, Carolina water-shield, fanwort, fish-grass, Washington plant, Washington-grass | NOT native to Hawaii | ?unresearched | ?unresearched |
| Caesalpinia bonduc (Fabaceae) | beach nicker, bonduc, divi-divi, gray nickers, hihikolo, kākalaioa, nicker bean, wait-a-bit, yellow nickers | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Caesalpinia decapetala (Fabaceae) | cat's claw, Mauritius thorn, Mysore thorn, puakelekino, wait-a-bit | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Caesalpinia ferrea (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Caesalpinia gilliesii (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Caesalpinia kavaiense (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Caesalpinia kavaiensis (Fabaceae) | uhiuhi | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Caesalpinia major (Fabaceae) | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Caesalpinia pulcherrima (Fabaceae) | Barbados flower-fence, Barbados-pride, bird of paradise, dwarf poinciana, flower-fence, ohai alii, paradise-flower, pride of Barbados | NOT native to Hawaii | ?unresearched | ?unresearched |
| Caesalpinia sappan (Fabaceae) | Brazilwood, sappan, sappanwood | (unresearched) | ?unresearched | ?unresearched |
| Caesalpinia sepiaria (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cajanus cajan (Fabaceae) | Congo pea, pī nūnū, pī Pokoliko, pigeon pea, red gram, yellow dhal | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cajanus scarabaeoides (Fabaceae) | peanut grass, tropical clover | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cakile edentula (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cakile maritima (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cakile maritima subsp. maritima (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Caladium bicolor (Araceae) | artist's pallet, caladium, elephant's-ear, fancy-leaf caladium, heart-of-Jesus | NOT native to Hawaii | ?unresearched | ?unresearched |
| Calamagrostis epigeios (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Calamagrostis epigejos (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Calamagrostis expansa (Poaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Calamagrostis hillebrandi (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Calamagrostis hillebrandii (Poaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Calamus spp. (Arecaceae) | rattan | NOT native to Hawaii | ?unresearched | ?unresearched |
| Calandrinia ciliata (Portulacaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Calandrinia menziesii (Portulacaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Calathea lutea (Marantaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Calathea majestica (Marantaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Calathea picturata (Marantaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Calathea roseopicta (Marantaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Calathea zebrina (Marantaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Calendula arvensis (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Calepina irregularis (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Calibrachoa sp. (Solanaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Calicotome spinosa (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Callaeum macropterum (Malpighiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Calliandra calothyrsus (Fabaceae) | powderpuff, red calliandra | NOT native to Hawaii | ?unresearched | ?unresearched |
| Calliandra calothyrus (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Calliandra haematocephala (Fabaceae) | blood red tassel flower, red powder puff, red powderpuff | NOT native to Hawaii | ?unresearched | ?unresearched |
| Calliandra houstoniana (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Calliandra houstoniana var. calothyrsus (Fabaceae) | tree calliandra | NOT native to Hawaii | ?unresearched | ?unresearched |
| Calliandra sp. (Fabaceae) | calliandra | NOT native to Hawaii | ?unresearched | ?unresearched |
| Calliandra spp. (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Calliandra surinamensis (Fabaceae) | Surinamese stickpea | NOT native to Hawaii | ?unresearched | ?unresearched |
| Callicarpa americana (Verbenaceae) | American beautyberry | NOT native to Hawaii | ?unresearched | ?unresearched |
| Callicarpa dichotoma (Verbenaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Callicarpa spp. (Verbenaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Callisia fragrans (Commelinaceae) | basket plant, basketplant, fragrant inch plant, spironema | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Callisia repens (Commelinaceae) | inch plant | NOT native to Hawaii | ?unresearched | ?unresearched |
| Callistachys lanceolata (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Callistemon citrinus (Myrtaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Callistemon rigidus (Myrtaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Callistemon rugulosus (Myrtaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Callistemon sp. (Myrtaceae) | bottle brush | NOT native to Hawaii | ?unresearched | ?unresearched |
| Callistemon viminalis (Myrtaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Callistephus chinensis (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Callistopteris baldwinii (Hymenophyllaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Callithamnion byssoides (Ceramiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Callitriche deflexa (Callitrichaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Callitriche hamulata (Callitrichaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Callitriche stagnalis (Callitrichaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Callitriche verna (Callitrichaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Callitris columellaris (Cupressaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Callitris endlicheri (Cupressaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Callitris glaucophylla (Cupressaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Callitris rhomboidea (Cupressaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Callitris robusta (Cupressaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Callitris sp. (Cupressaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Callitris verrucosa (Cupressaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Calluna vulgaris (Ericaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Calocedrus decurrens (Cupressaceae) | Incense cedar | NOT native to Hawaii | ?unresearched | ?unresearched |
| Calophyllum antillanum (Clusiaceae) | Alexandrian laurel, Antilles calophyllum, beauty leaf, calaba, galba, Indian laurel, kamani, Santa Maria tree | NOT native to Hawaii | ?unresearched | ?unresearched |
| Calophyllum calaba (Clusiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Calophyllum inophyllum (Clusiaceae) | kamani | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Caloplaca erythrantha (Teloschistaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Calopogonium caeruleum (Fabaceae) | calopo, calopogonium, jicama | NOT native to Hawaii | ?unresearched | ?unresearched |
| Calopogonium mucunoides (Fabaceae) | calopo, calopogonium | NOT native to Hawaii | ?unresearched | ?unresearched |
| Calothamnus graniticus (Myrtaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Calothamnus quadrifidus (Myrtaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Calothamnus validus (Myrtaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Calothrix confervicola (Rivulariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Calotis lappulacea (Asteraceae) | bur daisy, yellow burr daisy | NOT native to Hawaii | ?unresearched | ?unresearched |
| Calotropis gigantea (Asclepiadaceae) | bowstring hemp, calotrope, crown flower, crownplant, giant milkweed, madar, puakalaunu | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Calotropis procera (Asclepiadaceae) | akund, apple of Sodom, auricula tree, king's crown, madar, mudar, roostertree, rubber bush, small crown flower, small crownflower, Sodom apple, Sodom's milkweed, swallowwort | NOT native to Hawaii | ?unresearched | ?unresearched |
| Calycotome spinosa (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Calymperes fasciculatum (Calymperaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Calymperes tenerum (Calymperaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Calymperopsis semiliber (Calymperaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Calyptocarpus vialis (Asteraceae) | calyptocarpus, straggler daisy | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Calystegia pulchra (Convolvulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Calystegia sepium (Convolvulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Calystegia silvatica (Convolvulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Camelina microcarpa (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Camelina sativa (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Camellia japonica (Theaceae) | camellia | NOT native to Hawaii | ?unresearched | ?unresearched |
| Camellia sinensis (Theaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cameraria ohridella (Apocynaceae) | horse chestnut leaf miner | (unresearched) | ?unresearched | ?unresearched |
| Campanula floridana (Campanulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Campanula rapunculoides (Campanulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Campomanesia xanthocarpa (Myrtaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Campsis radicans (Bignoniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Camptochaete pulvinata (Lembophyllaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Campylopodium euphorocladum (Dicranaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Campylopodium medium (Dicranaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Campylopus densifolius (Dicranaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Campylopus exasperatus (Dicranaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Campylopus fragilis (Dicranaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Campylopus fragilis subsp. zollingerianus (Dicranaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Campylopus hawaiicus (Dicranaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Campylopus hawaiicus var. densifolius (Dicranaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Campylopus hawaiicus var. hawaiicoflexuosus (Dicranaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Campylopus hawaiicus var. hawaiicus (Dicranaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Campylopus incurvatus (Dicranaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Campylopus introflexus (Dicranaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Campylopus laxitextus (Dicranaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Campylopus polytrichoides (Dicranaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Campylopus praemorsus (Dicranaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Campylopus purpureo-flavescens (Dicranaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Campylopus schmidii (Dicranaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Campylopus schmidii var. hemitrichius (Dicranaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Campylopus schmidii var. schmidii (Dicranaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Campylopus skottsbergii (Dicranaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Campylopus umbellatus (Dicranaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Campylopus umbellatus var. pterotoneuron (Dicranaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Campylopus umbellatus var. umbellatus (Dicranaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Campylopus wheeleri (Dicranaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cananga odorata (Annonaceae) | lanalana, perfume tree, ylang-ylang | NOT native to Hawaii | ?unresearched | ?unresearched |
| Canarium harveyi (Burseraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Canarium indicum (Burseraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Canavalia cathartica (Fabaceae) | maunaloa | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Canavalia galeata (Fabaceae) | 'awikiwiki, puakauhi | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Canavalia hawaiiensis (Fabaceae) | awikiwiki, puakauhi | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Canavalia kauaiensis (Fabaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Canavalia molokaiensis (Fabaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Canavalia napaliensis (Fabaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Canavalia pubescens (Fabaceae) | awikiwiki | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Canavalia sericea (Fabaceae) | silky jackbean | NOT native to Hawaii | ?unresearched | ?unresearched |
| Canna glauca (Cannaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Canna indica (Cannaceae) | African arrowroot, edible canna, ali‘ipoe, arrowroot, canna, edible canna, Indian shot, li‘ipoe, poloka, purple arrowroot, red canna, wild canna | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Canna lutea (Cannaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Canna x generalis (Cannaceae) | canna lily, common garden canna, French canna, garden canna, hybrid canna lily, Indian shot | NOT native to Hawaii | ?unresearched | ?unresearched |
| Canna x orchiodes (Cannaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cannabis sativa (Cannabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Caperonia palustris (Euphorbiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Capparis sandwichiana (Capparaceae) | Hawaiian caper bush, maiapilo, pilo, pua pilo | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Capriola dactylon (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Capsella bursa-pastoris (Brassicaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Capsicum annuum (Solanaceae) | bell pepper, capsicum, cayenne pepper, cherry pepper, chili pepper, green chilli, hot pepper, long cayenne, long pepper, red pepper, sweet pepper | NOT native to Hawaii | ?unresearched | ?unresearched |
| Capsicum annuum var. glabriusculum (Solanaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Capsicum frutescens (Solanaceae) | bird chili, bird pepper, bird's-eye chili, bird's-eye pepper, chili pepper, hot pepper, nīoi, nīoi pepa, perennial chili, red chili, spur pepper, Tabasco pepper, tobasco | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Capsicum sp. (Solanaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Caragana arborescens (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carallia brachiata (Rhizophoraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cardamine bonariensis (Brassicaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cardamine flexuosa (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cardamine hirsuta (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cardamine impatiens (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cardamine occidentalis (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cardamine pratensis (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cardaria chalepensis (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cardaria draba (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cardaria draba subsp. chalepensis (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cardaria pubescens (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cardaria sp. (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cardaria spp. (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cardiospermum grandiflorum (Sapindaceae) | balloon vine, heartseed, heartseed vine | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cardiospermum halicacabum (Sapindaceae) | balloon vine, haleakai‘a, heart pea, heartseed, ‘inalua, love-in-a-puff, pōhuehue uka, pōniu, winter-cherry | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cardiospermum halicacabum var. halicacabum (Sapindaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cardiospermum sp. (Sapindaceae) | balloon vine, heartseed, pohuehue uka, poniu | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cardiospermum spp. (Sapindaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carduus acanthoides (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carduus crispus (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carduus nutans (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carduus nutans subsp. nutans (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carduus pycnocephalus (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carduus sp. (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carduus spp. (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carduus tenuiflorus (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carduus thoermeri (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carex albula (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carex alligata (Cyperaceae) | carex | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Carex arenaria (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carex brizoides (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carex buxbaumii subsp. buxbaumii (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carex disticha (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carex divisa (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carex divulsa subsp. divulsa (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carex echinata (Cyperaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Carex flacca (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carex flava (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carex kauaiensis (Cyperaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Carex kobomugi (Cyperaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Carex lasiocarpa (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carex lepidocarpa (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carex longebrachiata (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carex longii (Cyperaceae) | carex, Long's sedge | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Carex macloviana (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carex macloviana subsp. subfusca (Cyperaceae) | carex | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Carex meyenii (Cyperaceae) | carex | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Carex montis-eeka (Cyperaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Carex muskingumensis (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carex nebrascensis (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carex ovalis (Cyperaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Carex panicea (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carex paniculata (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carex pilulifera (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carex punctata (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carex rostrata (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carex scoparia (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carex spp. (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carex testacea (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carex thunbergii (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carex wahuensis (Cyperaceae) | carex | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Carex wahuensis subsp. herbstii (Cyperaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Carex wahuensis subsp. rubiginosa (Cyperaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Carex wahuensis subsp. wahuensis (Cyperaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Carica papaya (Caricaceae) | hē‘ī, hei, jack fruit, mammey apple, mīkana, mikana, milikana, mummy apple, papaia, papaw, papaya, pawpaw | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Carissa bispinosa (Apocynaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carissa macrocarpa (Apocynaceae) | Natal plum | NOT native to Hawaii | ?unresearched | ?unresearched |
| Carlina vulgaris (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carludovica palmata (Cyclanthaceae) | jipijapa, Panama hat plant, Panama-hat palm | NOT native to Hawaii | ?unresearched | ?unresearched |
| Carludovica sp. (Cyclanthaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Carmona retusa (Boraginaceae) | carmona, Fukien tea, Philippine tea, scorpionbush | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Carpesium cernuum (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carpobrotus acinaciformis (Aizoaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Carpobrotus aequilaterus (Aizoaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carpobrotus chilensis (Aizoaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carpobrotus edulis (Aizoaceae) | Hottentot fig, ice plant, pigface | NOT native to Hawaii | ?unresearched | ?unresearched |
| Carpobrotus sp. (Aizoaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Carpobrotus spp. (Aizoaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carrichtera annua (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carthamus baeticus (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carthamus dentatus (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carthamus glaucus (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carthamus lanatus (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carthamus leucocaulos (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carthamus tinctorius (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carum carvi (Apiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Carya pecan (Juglandaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Caryota mitis (Arecaceae) | Burmese fishtail palm, clustered fishtail palm, clustering fishtail palm, fish tail palm, lesser fish tail palm, tufted fishtail palm, winepalm | NOT native to Hawaii | ?unresearched | ?unresearched |
| Caryota sp. (Arecaceae) | fish tail palm | NOT native to Hawaii | ?unresearched | ?unresearched |
| Caryota urens (Arecaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cascabela peruviana (Apocynaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cascabela thevetia (Apocynaceae) | be-still tree, lucky nut, nohomalie, yellow oleaner | (unresearched) | ?unresearched | ?unresearched |
| Casimiroa edulis (Rutaceae) | white sapote | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cassia alata (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cassia bicapsularis (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cassia coluteoides (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cassia corymbosa (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cassia didymobotrya (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cassia fasciculata (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cassia fistula (Fabaceae) | golden shower, golden shower tree, Indian laburnum, pudding-pipe tree, purging cassia | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cassia floribunda (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cassia grandis (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cassia javanica (Fabaceae) | pink shower tree | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cassia mimosoides (Fabaceae) | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Cassia obtusifolia (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cassia occidentalis (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cassia siamea (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cassia sophera (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cassia tomentosa (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cassia tora (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cassia x nealiae (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cassia x nealii (Fabaceae) | rainbow shower tree | (unresearched) | ?unresearched | ?unresearched |
| Cassinia leptophylla (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cassytha filiformis (Lauraceae) | kaunaoa pehu | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Castanea ashei (Fagaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Castilla elastica (Moraceae) | Mexican rubber tree, Panama rubber tree, uletree | NOT native to Hawaii | ?unresearched | ?unresearched |
| Castilleja arvensis (Scrophulariaceae) | Indian paintbrush | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Castilleja exserta subsp. exserta (Scrophulariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Casuarina cunninghamiana (Casuarinaceae) | cunninghamia beefwood, river oak, river she-oak, small cone ironwood | NOT native to Hawaii | ?unresearched | ?unresearched |
| Casuarina cunninghamiana var. cunninghamiana (Casuarinaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Casuarina equisetifolia (Casuarinaceae) | Australian beefwood, Australian pine, beefwood, casuarina, common ironwood, horsetail tree, ironwood, paina, she oak | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Casuarina glauca (Casuarinaceae) | gray sheoak, gray sheoak ironwood, long-leaf ironwood, longleaf ironwood, saltmarsh ironwood, swamp oak, swamp she-oak | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Casuarina littoralis (Casuarinaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Casuarina sp. (Casuarinaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Casuarina spp. (Casuarinaceae) | ironwood | NOT native to Hawaii | ?unresearched | ?unresearched |
| Catabrosa aquatica (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Catalpa bignonioides (Bignoniaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Catalpa longissima (Bignoniaceae) | yoke-wood | NOT native to Hawaii | ?unresearched | ?unresearched |
| Catalpa ovata (Bignoniaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Catalpa speciosa (Bignoniaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Catalpa spp. (Bignoniaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Catapodium marinum (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Catapodium rigidum (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Catharanthus roseus (Apocynaceae) | Cape periwinkle, kīhāpai, kihapai, Madagascar periwinkle, old-maid, periwinkle, rose periwinkle, rosy periwinkle, vincus, white flower | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Caulerpa macrophysa (Caulerpaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Caulerpa nummularia (Caulerpaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Caulerpa racemosa (Caulerpaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Caulerpa serrulata (Caulerpaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Caulerpa sertualariodes (Caulerpaceae) | NATIVE to Hawaii | PRESENT in Hawaii | ?unresearched | |
| Caulerpa sertularioides (Caulerpaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Caulerpa taxifolia (Caulerpaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Caulerpa webbiana (Caulerpaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cayaponia glandulosa (Cucurbitaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cayratia japonica (Vitaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cecropia obtusifolia (Cecropiaceae) | guarumo, trumpet tree | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cecropia peltata (Cecropiaceae) | snakewood, trumpet tree | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cedrela chinensis (Meliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cedrela odorata (Meliaceae) | Barbados cedar, cedrela, cigar box cedar, Mexican cedar, Spanish cedar, West Indian cedar | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cedrela toona (Meliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cedrus deodara (Pinaceae) | deodar cedar | NOT native to Hawaii | ?unresearched | ?unresearched |
| Ceiba pentandra (Bombacaceae) | kapok, kapok tree, silk-cotton tree | NOT native to Hawaii | ?unresearched | ?unresearched |
| Celastrus orbiculata (Celastraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Celastrus orbiculatus (Celastraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Celosia argentea (Amaranthaceae) | cock's comb, cockscomb, feather cockscomb, red spinach, silver cockscomb | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Celosia sp. (Amaranthaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Celtis australis (Ulmaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Celtis mississippiensis (Ulmaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Celtis occidentalis (Ulmaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Celtis pumila subsp. georgiana (Ulmaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Celtis sinensis (Ulmaceae) | Chinese elm, Chinese hackberry, Japanese hackberry | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cenchrus agrimonioides (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cenchrus agrimonioides var. agrimonioides (Poaceae) | kamanomano | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cenchrus agrimonioides var. laysanensis (Poaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cenchrus biflorus (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cenchrus brownii (Poaceae) | Brown's burgrass, Brown's sandbur, burgrass, burr grass, fine-bristle sandbur, green sandbur, sand bur, slim-bristle sandbur | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cenchrus caliculatus (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cenchrus ciliaris (Poaceae) | African foxtail grass, anjan grass, buffel grass, buffelgrass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cenchrus echinatus (Poaceae) | bur grass, burgrass, burr grass, common sandbur, golden grass, hedgehog grass, mau‘u kukū, Mossman River grass, sand bur, sand burr, sandbur, southern sandbur, ‘ume‘alu | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cenchrus hillebrandianus (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cenchrus incertus (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cenchrus longispinus (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cenchrus pilosus (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cenchrus setiger (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cenchrus setigerus (Poaceae) | cenchrus | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cenchrus spinifex (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Centaurea biebersteinii (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Centaurea calcitrapa (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Centaurea cyanus (Asteraceae) | bachelor's button, garden cornflower | NOT native to Hawaii | ?unresearched | ?unresearched |
| Centaurea dealbata (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Centaurea debeauxii (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Centaurea debeauxii subsp. thuillieri (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Centaurea diffusa (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Centaurea dubia (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Centaurea iberica (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Centaurea jacea (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Centaurea macrocephala (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Centaurea maculosa (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Centaurea melitensis (Asteraceae) | Maltese cockspur, Maltese star thistle, Napa thistle, yellow star thistle | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Centaurea montana (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Centaurea nigra (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Centaurea nigrescens (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Centaurea paniculata (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Centaurea pratensis (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Centaurea repens (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Centaurea solstitialis (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Centaurea spp. (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Centaurea stoebe (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Centaurea transalpina (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Centaurea trichocephala (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Centaurea triumfettii (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Centaurea virgata (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Centaurium erythraea (Gentianaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Centaurium erythraea subsp. erythraea (Gentianaceae) | bitter herb | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Centaurium maritimum (Gentianaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Centaurium sebaeoides (Gentianaceae) | awiwi | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Centaurium spicatum (Gentianaceae) | spiked centaury | NOT native to Hawaii | ?unresearched | ?unresearched |
| Centaurium spp. (Gentianaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Centaurium tenuiflorum (Gentianaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Centella asiatica (Apiaceae) | Asiatic pennywort, Indian pennywort, marsh pennywort, pennyweed, pennywort, pohe kula, sheep-rot, thankuni | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Centipeda cunninghamii (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Centranthus macrosiphon (Valerianaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Centranthus ruber (Valerianaceae) | valerian | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Centranthus ruber subsp. ruber (Valerianaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Centratherum punctatum (Asteraceae) | Brazilian button flower, centratherum, lark daisy | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Centratherum punctatum subsp. punctatum (Asteraceae) | centratherum | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Centroceras clavulatum (Ceramiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Centroceras corallophiloides (Ceramiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Centroceras minutum (Ceramiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Centrolobium paraense (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Centrosema molle (Fabaceae) | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Centrosema pascuorum (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Centrosema pubescens (Fabaceae) | bluebell, butterfly pea, centro, spurred bufferly-pea | (unresearched) | ?unresearched | ?unresearched |
| Cephaleuros virescens (Trentepohliaceae) | (unresearched) | PRESENT in Hawaii | ?unresearched | |
| Ceramium clarionense (Ceramiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ceramium codii (Ceramiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ceramium dumosertum (Ceramiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ceramium fimbriatum (Ceramiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ceramium flaccidum (Ceramiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cerastium arvense (Caryophyllaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cerastium balearicum (Caryophyllaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cerastium biebersteinii (Caryophyllaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cerastium comatum (Caryophyllaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cerastium diffusum (Caryophyllaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cerastium dubium (Caryophyllaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cerastium fontanum (Caryophyllaceae) | common mouse-ear chickweed | (unresearched) | ?unresearched | ?unresearched |
| Cerastium fontanum subsp. triviale (Caryophyllaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cerastium fontanum subsp. vulgare (Caryophyllaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cerastium glomeratum (Caryophyllaceae) | cerastium | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cerastium grandiflorum (Caryophyllaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cerastium pumilum (Caryophyllaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cerastium purpurascens (Caryophyllaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cerastium semidecandrum (Caryophyllaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cerastium siculum (Caryophyllaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cerastium spp. (Caryophyllaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cerastium tomentosum (Caryophyllaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cerastium viscosum (Caryophyllaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cerastium vulgare (Caryophyllaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cerastium vulgatum (Caryophyllaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ceratocephala testiculata (Ranunculaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ceratodon purpureus (Ditrichaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ceratodon purpureus f. purpureus (Ditrichaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Ceratodon purpureus f. xanthopus (Ditrichaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Ceratodon purpureus subsp. purpureus (Ditrichaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Ceratolejeunea oculata (Lejeuneaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Ceratonia siliqua (Fabaceae) | carob, kelakio, St. John's Bread | NOT native to Hawaii | ?unresearched | ?unresearched |
| Ceratopetalum gummiferum (Cunoniaceae) | New South Wales Christmas tree | NOT native to Hawaii | ?unresearched | ?unresearched |
| Ceratophyllum demersum (Ceratophyllaceae) | coontail, hornwort | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Ceratophyllum llerenae (Ceratophyllaceae) | prickly hornwort | (unresearched) | ?unresearched | ?unresearched |
| Ceratopteris pteridoides (Pteridaceae) | floating fern | (unresearched) | ?unresearched | ?unresearched |
| Ceratopteris thalictroides (Pteridaceae) | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Cerbera manghas (Apocynaceae) | cerbera, reva | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cerbera sp. (Apocynaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cercis canadensis (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cercis siliquastrum (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cercospora eupatorii (Mycosphaerellaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cercospora sp. (Mycosphaerellaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cereus peruvianus (Cactaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cereus undatus (Cactaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cereus uruguayanus (Cactaceae) | hedge cactus | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cereus uruguayensis (Cactaceae) | hedge cactus, Peruvian apple, spiny tree cactus | (unresearched) | ?unresearched | ?unresearched |
| Cerothamnus ceriferus (Myrtaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cerothamnus inodorus (Myrtaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cestrum aurantiacum (Solanaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cestrum auriculatum (Solanaceae) | orange cestrum | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cestrum diurnum (Solanaceae) | China berry, Chinese inkberry, day cestrum, day jessamine, inkberry, mākāhala | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cestrum elegans (Solanaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cestrum laevigatum (Solanaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cestrum nocturnum (Solanaceae) | ‘ala aumoe, kūpaoa, lady of the night, night cestrum, night queen, night-blooming jasmine, night-flowering cestrum, night-flowering jasmine, onaona Iāpana, queen of the night | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cestrum parqui (Solanaceae) | Chilean cestrum, green cestrum, green poison-berry, willow-leaved jessamine | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cestrum spp. (Solanaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chaenomeles japonica (Rosaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chaenorhinum minus (Plantaginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chaetochloa barbata (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chaetochloa geniculata (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chaetochloa lutescens (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chaetochloa palmifolia (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chaetochloa verticillata (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chaetomorpha antennina (Cladophoraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chaetomorpha basiretrorsa (Cladophoraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chaetomorpha indica (Cladophoraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chamaecrista mimosoides (Fabaceae) | Japanese tea | NOT native to Hawaii | ?unresearched | ?unresearched |
| Chamaecrista nictitans (Fabaceae) | laukī, partridge pea, sensitive partridge pea, sensitive pea, wild sensitive plant | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Chamaecrista nictitans var. glabra (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chamaecrista nictitans var. glabrata (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chamaecrista rotundifolia (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chamaecyparis lawsoniana (Cupressaceae) | Lawson cypress, Port Orford cedar | NOT native to Hawaii | ?unresearched | ?unresearched |
| Chamaecyparis pisifera (Cupressaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chamaecytisus palmensis (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chamaecytisus prolifer (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chamaecytisus proliferus (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chamaedorea cataractarum (Arecaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Chamaedorea elegans (Arecaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Chamaedorea seifrizii (Arecaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Chamaelaucium uncinatum (Myrtaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chamaemelum nobile (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chamaenerion angustifolium (Onagraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chamaesyce arnottiana (Euphorbiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Chamaesyce atrococca (Euphorbiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Chamaesyce australis (Euphorbiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chamaesyce celastroides (Euphorbiaceae) | akoko | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Chamaesyce celastroides var. amplectens (Euphorbiaceae) | akoko | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Chamaesyce celastroides var. celastroides (Euphorbiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Chamaesyce celastroides var. hanapepensis (Euphorbiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Chamaesyce celastroides var. kaenana (Euphorbiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Chamaesyce celastroides var. laehiensis (Euphorbiaceae) | akoko | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Chamaesyce celastroides var. lorifolia (Euphorbiaceae) | akoko | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Chamaesyce celastroides var. stokesii (Euphorbiaceae) | akoko | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Chamaesyce celastroides var. tomentella (Euphorbiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Chamaesyce clusiifolia (Euphorbiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Chamaesyce degeneri (Euphorbiaceae) | akoko | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Chamaesyce deppeana (Euphorbiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Chamaesyce eleanoriae (Euphorbiaceae) | 'akoko | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Chamaesyce halemanui (Euphorbiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Chamaesyce herbstii (Euphorbiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Chamaesyce hirta (Euphorbiaceae) | asthma plant, garden spurge, hairy spurge, koko kahiki, old blood, sneeze weed, spurge | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Chamaesyce hypericifolia (Euphorbiaceae) | beach spurge, graceful spurge | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Chamaesyce hyssopifolia (Euphorbiaceae) | hyssop-leaf sandmat | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Chamaesyce kuwaleana (Euphorbiaceae) | akoko | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Chamaesyce maculata (Euphorbiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Chamaesyce multiformis var. microphylla (Euphorbiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Chamaesyce multiformis var. multiformis (Euphorbiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Chamaesyce olowaluana (Euphorbiaceae) | akoko | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Chamaesyce ophthalmica (Euphorbiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Chamaesyce prostrata (Euphorbiaceae) | creeping spurge, prostrate sandmat, prostrate spurge, red caustic creeper | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Chamaesyce remyi var. hanaleiensis (Euphorbiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Chamaesyce remyi var. kauaiensis (Euphorbiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Chamaesyce remyi var. remyi (Euphorbiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Chamaesyce rockii (Euphorbiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Chamaesyce skottsbergii (Euphorbiaceae) | akoko | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Chamaesyce skottsbergii var. kalaeloana (Euphorbiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chamaesyce skottsbergii var. skottsbergii (Euphorbiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Chamaesyce skottsbergii var. vaccinioides (Euphorbiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Chamaesyce sparsiflora (Euphorbiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Chamaesyce thymifolia (Euphorbiaceae) | chickenweed, dwarf spurge, gulf sandmat, red caustic creeper, spurge, thyme-leafed spurge | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Chambeyronia macrocarpa (Arecaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chamelaucium uncinatum (Myrtaceae) | waxflower | NOT native to Hawaii | ?unresearched | ?unresearched |
| Chamomilla suaveolens (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Champia parvula (Champiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Champia vieillardii (Champiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chara braunii (Characeae) | (unresearched) | ?unresearched | ?unresearched | |
| Charpentiera densiflora (Amaranthaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Charpentiera elliptica (Amaranthaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Charpentiera obovata (Amaranthaceae) | papala | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Charpentiera ovata (Amaranthaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Charpentiera ovata var. niuensis (Amaranthaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Charpentiera ovata var. ovata (Amaranthaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Charpentiera tomentosa (Amaranthaceae) | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Charpentiera tomentosa var. maakuaensis (Amaranthaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Charpentiera tomentosa var. tomentosa (Amaranthaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Chasmanthe aethiopica (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chasmanthe bicolor (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chasmanthe floribunda (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chasmanthium latifolium (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cheiranthus cheiri (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cheirodendron dominii (Araliaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cheirodendron fauriei (Araliaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cheirodendron forbesii (Araliaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cheirodendron platyphyllum (Araliaceae) | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Cheirodendron platyphyllum subsp. kauaiense (Araliaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cheirodendron platyphyllum subsp. platyphyllum (Araliaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cheirodendron spp. (Araliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cheirodendron trigynum (Araliaceae) | lapalapa, olapa | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cheirodendron trigynum subsp. helleri (Araliaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cheirodendron trigynum subsp. trigynum (Araliaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Chelidonium majus (Papaveraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chenopodium album (Chenopodiaceae) | Antigua hay grass, fat hen, goosefoot, lamb's quarters, Nandi blue grass, Nawai grass, pigweed, silver grass, white goosefoot | NOT native to Hawaii | ?unresearched | ?unresearched |
| Chenopodium ambrosioides (Chenopodiaceae) | American wormseed, bluebush, Jerusalem tea, Mexican tea, Spanish-tea, wormseed | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Chenopodium berlandieri (Chenopodiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Chenopodium botrys (Chenopodiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Chenopodium capitum (Chenopodiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Chenopodium carinatum (Chenopodiaceae) | chenopodium | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Chenopodium foliosum (Chenopodiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Chenopodium giganteum (Chenopodiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Chenopodium gigantospermum (Chenopodiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Chenopodium glaucum (Chenopodiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Chenopodium macrospermum (Chenopodiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Chenopodium multifidum (Chenopodiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Chenopodium murale (Chenopodiaceae) | ‘āheahea, Australian-spinach, green fat hen, lamb's quarters, nettle-leaf goosefoot, salt-green, sowbane | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Chenopodium oahuense (Chenopodiaceae) | aweoweo | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Chenopodium polyspermum (Chenopodiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Chenopodium pumilio (Chenopodiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Chenopodium simplex (Chenopodiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Chenopodium vulvaria (Chenopodiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Chionanthus intermedius (Oleaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chionanthus ramiflorus (Oleaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chione sylvicola (Rubiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chloranthus sessilifolius (Chloranthaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chloris barbata (Poaceae) | airport grass, feather finger grass, fingergrass, mau‘u lei, plush grass, purpletop chloris, swollen fingergrass, swollen windmill grass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Chloris divaricata (Poaceae) | slender chloris, spreading windmill grass, star grass, star windmill grass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Chloris gayana (Poaceae) | Rhodes grass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Chloris inflata (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chloris radiata (Poaceae) | plush grass, radiate fingergrass, radiate windmill grass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Chloris sp. (Poaceae) | fingergrass | NOT native to Hawaii | ?unresearched | ?unresearched |
| Chloris verticillata (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chloris virgata (Poaceae) | feather finger grass, Feather fingergrass, feather windmill grass, feathered chloris, feathertop Rhodes grass, feathery Rhodes grass, oldland grass, sweet grass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Chlorodesmis caespitosa (Udoteaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chlorophytum comosum (Liliaceae) | bracket plant, ribbon plant, spider ivy, spider plant | NOT native to Hawaii | ?unresearched | ?unresearched |
| Chlorophytum saundersiae (Liliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chlorophytum sp. (Liliaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Chnoospora implexa (Chnoosporaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chnoospora minima (Chnoosporaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chondria minutula (Rhodomelaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chondria polyrhiza (Rhodomelaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chondrilla juncea (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chondrodendron tomentosum (Menispermaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chondrophycus cartilagineus (Rhodomelaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chondrophycus dotyi (Rhodomelaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chondrophycus parvipapillatus (Rhodomelaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chondrophycus succisus (Rhodomelaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chondrus crispus (Gigartinaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chonemorpha fragrans (Apocynaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chorisia speciosa (Bombacaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Chorispora tenella (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Christella boydiae (Thelypteridaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Christella dentata x parasitica (Thelypteridaceae) | hybrid christella | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Christella harveyi (Thelypteridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Christella wailele (Thelypteridaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Christella x incesta (Thelypteridaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Christella x palmeri (Thelypteridaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Christella x_incesta (Thelypteridaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Christella x_palmeri (Thelypteridaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Chromolaena odorata (Asteraceae) | bitter bush, Christmasbush, chromolaena, devilweed, hagonoy, Jack in the bush, Siam weed, triffid weed | NOT native to Hawaii | ?unresearched | ?unresearched |
| Chromolaena squalida (Asteraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Chroodactylon ramosum (Porphyridiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chrozophora tinctoria (Euphorbiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chrysalidocarpus lutescens (Arecaceae) | golden fruited palm | NOT native to Hawaii | ?unresearched | ?unresearched |
| Chrysanthemodiscus floriatus (Chrysanthemodiscaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chrysanthemoides monilifera (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chrysanthemoides monilifera subsp. monilifera (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chrysanthemoides monilifera subsp. rotundata (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chrysanthemum balsamita (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chrysanthemum coronarium (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chrysanthemum corymbosum (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chrysanthemum leucanthemum (Asteraceae) | field daisy, ox-eye daisy, pua Pake, white daisy | (unresearched) | ?unresearched | ?unresearched |
| Chrysanthemum maximum (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chrysanthemum parthenium (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chrysanthemum sp. (Asteraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Chrysanthemum x superbum (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chrysobalanus icaco (Chrysobalanaceae) | chrysobalanus, coco plum, cocoplum | NOT native to Hawaii | ?unresearched | ?unresearched |
| Chrysocoma coma-aurea (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chrysophyllum cainito (Sapotaceae) | cainito, star apple | NOT native to Hawaii | ?unresearched | ?unresearched |
| Chrysophyllum mexicanum (Sapotaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chrysophyllum oliviforme (Sapotaceae) | damson plum, satin leaf, satinleaf, wild star-apple | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Chrysophyllum venezuelanense (Sapotaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chrysopogon aciculatus (Poaceae) | golden beardgrass, lovegrass, Mackie's pest, mānienie ‘ula, manienie ula, needle grass, pi‘ipi‘i, pilipili ‘ula, seed grass | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Chrysopogon zizanioides (Poaceae) | cuscus grass, khus-khus, vetiver grass | NOT native to Hawaii | ?unresearched | ?unresearched |
| Chrysosplenium valdivicum (Saxifragaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Chukrasia tabularis (Meliaceae) | Burmese almondwood, chickrassy, Chittagong wood | NOT native to Hawaii | ?unresearched | ?unresearched |
| Chukrasia velutina (Meliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cibotium chamissoi (Dicksoniaceae) | hapuu | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Cibotium glaucum (Dicksoniaceae) | hapuu pulu | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cibotium menziesii (Dicksoniaceae) | hapuu ii | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cibotium nealiae (Dicksoniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cibotium sp. (Dicksoniaceae) | hapuu | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Cibotium x heleniae (Dicksoniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cibotium x_heleniae (Dicksoniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cicendia filiformis (Gentianaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cicendia quadrangularis (Gentianaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cicerbita prenanthoides (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cichorium endivia (Asteraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cichorium intybus (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ciclospermum leptophyllum (Apiaceae) | fir-leaved celery | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cicuta douglasii (Apiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cimicifuga brachycarpa (Ranunculaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cinchona calisaya (Rubiaceae) | ledger quinine | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cinchona officinalis (Rubiaceae) | lojabark | (unresearched) | PRESENT in Hawaii | ?unknown |
| Cinchona pubescens (Rubiaceae) | quinine, quinine tree, red cinchona | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cinchona succirubra (Rubiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cinnamomum burmanni (Lauraceae) | Indonesian cassia, padang cassia | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cinnamomum burmannii (Lauraceae) | Padang cassia | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cinnamomum camphora (Lauraceae) | camphor laurel, camphor tree | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cinnamomum verum (Lauraceae) | cinnamon, cinnamon tree | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cinnamomum zeylanicum (Lauraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cirsium arvense (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cirsium lanceolatum (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cirsium oleraceum (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cirsium palustre (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cirsium spp. (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cirsium vulgare (Asteraceae) | black thistle, bull thistle, plume thistle, pua kala, Scotch thistle, spear thistle | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cissus discolor (Vitaceae) | climbing begonia, rex begonia vine, trailing begonia | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cissus nodosa (Vitaceae) | grape ivy, Javanese treebine | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cissus quadrangularis (Vitaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cissus rhombifolia (Vitaceae) | cissus | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cissus rotundifolia (Vitaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cissus sp. (Vitaceae) | cissus | (unresearched) | ?unresearched | ?unresearched |
| Cistus incanus (Cistaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cistus ladanifer (Cistaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cistus sp. (Cistaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Citharexylum caudatum (Verbenaceae) | juniper berry, juniperberry | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Citharexylum gentryi (Verbenaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Citharexylum spinossum (Verbenaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Citharexylum spinosum (Verbenaceae) | fiddlewood | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Citrofortunella microcarpa (Rutaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Citrullus colocynthis (Cucurbitaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Citrullus lanatus (Cucurbitaceae) | watermelon, wild melon | NOT native to Hawaii | ?unresearched | ?unresearched |
| Citrullus vulgaris (Cucurbitaceae) | watermelon | (unresearched) | ?unresearched | ?unresearched |
| Citrus aurantiifolia (Rutaceae) | Key lime, lime, Mexican lime, orange, West Indian lime | NOT native to Hawaii | ?unresearched | ?unresearched |
| Citrus aurantium (Rutaceae) | bigarade, bitter orange, Seville orange, sour orange | (unresearched) | ?unresearched | ?unresearched |
| Citrus limetta (Rutaceae) | sweet lemon, sweet lime | NOT native to Hawaii | ?unresearched | ?unresearched |
| Citrus limon (Rutaceae) | lemon | NOT native to Hawaii | ?unresearched | ?unresearched |
| Citrus limonia (Rutaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Citrus medica (Rutaceae) | citron | (unresearched) | ?unresearched | ?unresearched |
| Citrus nobilis (Rutaceae) | king orange, King-of-Siam, tangor | (unresearched) | ?unresearched | ?unresearched |
| Citrus reticulata (Rutaceae) | tangerine | NOT native to Hawaii | ?unresearched | ?unresearched |
| Citrus sinensis (Rutaceae) | blood orange, navel orange, orange, sweet orange, Valencia orange | NOT native to Hawaii | ?unresearched | ?unresearched |
| Citrus sp. (Rutaceae) | citrus | NOT native to Hawaii | ?unresearched | ?unresearched |
| Citrus x limonia (Rutaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cladium jamaicense (Cyperaceae) | uki | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Cladium mariscus (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cladochaeta candidissima (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cladophora catenata (Cladophoraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cladophora herpestica (Cladophoraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cladophora sericea (Cladophoraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cladophora vagabunda (Cladophoraceae) | NATIVE to Hawaii | PRESENT in Hawaii | ?unresearched | |
| Claopodium prionophyllum (Thuidiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Claopodium whippleanum (Thuidiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Claoxylon sandwicense (Euphorbiaceae) | poola | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Clastobryopsis robusta (Sematophyllaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Clausena excavata (Rutaceae) | clausena | NOT native to Hawaii | ?unresearched | ?unresearched |
| Clausena lansium (Rutaceae) | wampi | NOT native to Hawaii | ?unresearched | ?unresearched |
| Claytonia perfoliata (Portulacaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Claytonia sibirica (Portulacaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Clematis flammula (Ranunculaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Clematis hexapetala (Ranunculaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Clematis orientalis (Ranunculaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Clematis sp. (Ranunculaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Clematis terniflora (Ranunculaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Clematis tibetana (Ranunculaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Clematis vitalba (Ranunculaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cleome aculeata (Capparaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cleome gynandra (Capparaceae) | African spider-flower, bastard-mustard, cat's-whiskers, honohina, ‘ili‘ohu, iliohu, spider wisp, wild spider flower | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cleome hassleriana (Capparaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cleome monophylla (Capparaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cleome rutidosperma (Capparaceae) | fringed spiderflower | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cleome viscosa (Capparaceae) | cleome, spider flower, tickweed | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cleretum papulosum (Aizoaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Clermontia arborescens (Campanulaceae) | haha, oha, oha wai, oha wai nui | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Clermontia arborescens subsp. arborescens (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Clermontia arborescens subsp. waihiae (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Clermontia arborescens subsp. waikoluensis (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Clermontia calophylla (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Clermontia clermontioides subsp. clermontioides (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Clermontia clermontioides subsp. rockiana (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Clermontia drepanomorpha (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Clermontia faurei (Campanulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Clermontia fauriei (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Clermontia grandiflora (Campanulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Clermontia grandiflora subsp. grandiflora (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Clermontia grandiflora subsp. maxima (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Clermontia grandiflora subsp. munroi (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Clermontia hawaiiensis (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Clermontia kakeana (Campanulaceae) | haha, oha, oha wai | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Clermontia kohalae (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Clermontia lindseyana (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Clermontia micrantha (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Clermontia montis-loa (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Clermontia multiflora (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Clermontia oblongifolia (Campanulaceae) | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Clermontia oblongifolia subsp. brevipes (Campanulaceae) | 'oha wai | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Clermontia oblongifolia subsp. mauiensis (Campanulaceae) | 'oha wai | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Clermontia oblongifolia subsp. oblongifolia (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Clermontia pallida (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Clermontia parviflora (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Clermontia peleana (Campanulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Clermontia peleana subsp. peleana (Campanulaceae) | 'oha wai | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Clermontia peleana subsp. singuliflora (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Clermontia persicifolia (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Clermontia pyrularia (Campanulaceae) | 'oha wai | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Clermontia samuelii (Campanulaceae) | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Clermontia samuelii subsp. hanaensis (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Clermontia samuelii subsp. samuelii (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Clermontia sp. (Campanulaceae) | haha, oha, oha wai | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Clermontia tuberculata (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Clermontia waimeae (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Clerodendrum aculeatum (Verbenaceae) | prickly myrtle | NOT native to Hawaii | ?unresearched | ?unresearched |
| Clerodendrum buchanani (Verbenaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Clerodendrum buchananii (Verbenaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Clerodendrum buchananii var. fallax (Verbenaceae) | Java glorybower, pagoda-flower, red clerodendrum, scarlet clerodendrum | NOT native to Hawaii | ?unresearched | ?unresearched |
| Clerodendrum bungei (Verbenaceae) | rose glorybower | NOT native to Hawaii | ?unresearched | ?unresearched |
| Clerodendrum calamitosum (Verbenaceae) | white butterfly | NOT native to Hawaii | ?unresearched | ?unresearched |
| Clerodendrum chinense (Verbenaceae) | fragrant clerodendrum, glory bower, Honolulu rose, pikake hohono, pikake wauke, stickbush | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Clerodendrum fragrans (Verbenaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Clerodendrum heterophyllum f. baueri (Verbenaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Clerodendrum indicum (Verbenaceae) | clerodendrum | NOT native to Hawaii | ?unresearched | ?unresearched |
| Clerodendrum inerme (Verbenaceae) | seaside clerodendrum | NOT native to Hawaii | ?unresearched | ?unresearched |
| Clerodendrum japonicum (Verbenaceae) | glorybower | NOT native to Hawaii | ?unresearched | ?unresearched |
| Clerodendrum macrostegium (Verbenaceae) | velvetleaf glorybower | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Clerodendrum paniculatum (Verbenaceae) | pagoda flower | NOT native to Hawaii | ?unresearched | ?unresearched |
| Clerodendrum philippinum (Verbenaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Clerodendrum quadriloculare (Verbenaceae) | bronze-leaved clerodendrum, clerodendrum, fire works, Philippine glorybower | NOT native to Hawaii | ?unresearched | ?unresearched |
| Clerodendrum sp. (Verbenaceae) | clerodendrum | NOT native to Hawaii | ?unresearched | ?unresearched |
| Clerodendrum speciosissimum (Verbenaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Clerodendrum speciosum (Verbenaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Clerodendrum spp. (Verbenaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Clerodendrum thomsoniae (Verbenaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Clianthus formosus (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Clidemia hirta (Melastomataceae) | Koster's curse, soap bush | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Clidemia hirta var. hirta (Melastomataceae) | (unresearched) | ?unresearched | ?unresearched | |
| Climacosphenia moniligera (Climacospheniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Clinopodium vulgare (Lamiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Clitoria laurifolia (Fabaceae) | laurel-leaf pigeonwings | NOT native to Hawaii | ?unresearched | ?unresearched |
| Clitoria ternatea (Fabaceae) | Asian pigeonwings, blue pea, butterfly pea, blue pea, cordofan pea | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Clusia rosea (Clusiaceae) | autograph tree, copey, pitch apple, Scotch attorney, signature tree | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Clytostoma callistegioides (Bignoniaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cnidoscolus aconitifolius (Euphorbiaceae) | cabbage star, tree spinach | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cnidoscolus chayamansa (Euphorbiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cnidoscolus urens (Euphorbiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cobaea scandens (Polemoniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Coccinia grandis (Cucurbitaceae) | ivy gourd, scarlet gourd, scarlet-fruited gourd | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Coccodiella miconiae (Phyllachoraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Coccoloba uvifera (Polygonaceae) | sea grape | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Coccothrinax argentata (Arecaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Coccothrinax argentea (Arecaceae) | coccothrinax | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cocculus laurifolius (Menispermaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cocculus orbiculatus (Menispermaceae) | hue, huehue, hueie, inalua | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cochliostema odoratissimum (Commelinaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cochlospermum vitifolium (Bixaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cocos nucifera (Arecaceae) | coconut, coconut palm, heari, niu, ololani | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Codiaeum variegatum (Euphorbiaceae) | croton | NOT native to Hawaii | ?unresearched | ?unresearched |
| Codium arabicum (Codiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Codium edule (Codiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Codium fragile (Codiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Codium fragile subsp. atlanticum (Codiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Codium fragile subsp. tomentosoides (Codiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Codium reediae (Codiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Coffea arabica (Rubiaceae) | Arabian coffee, coffee | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Coffea liberica (Rubiaceae) | Liberian coffee | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Coffea mauritiana (Rubiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Coffea spp. (Rubiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Coincya monensis (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Coix lachryma-jobi (Poaceae) | Job's tears | NOT native to Hawaii | ?unresearched | ?unresearched |
| Coix lacryma-jobi (Poaceae) | adlay, adlay millet, Job's tears, kūkaekōlea, ‘ohe‘ohe, pū'ohe'ohe, pūpū kōlea | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Coleonema pulchellum (Rutaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Coleothrix irregularis (Rhodymeniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Coleus scutellarioides (Lamiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Colletotrichum gloeosporioides (Phyllachoraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Colletotrichum gloeosporioides f. sp. miconiae (Phyllachoraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Colletotrichum gloeosporioides f.s. clidemiae (Phyllachoraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Colletotrichum gloeosporoides (Phyllachoraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Colletotrichum sp. (Phyllachoraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Colocasia esculenta (Araceae) | cocoyam, dasheen, eddo, elephant's-ear, kalo, madumbe, taro | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Colocasia esculenta var. esculenta (Araceae) | (unresearched) | ?unresearched | ?unresearched | |
| Colocasia heterochroma (Araceae) | (unresearched) | ?unresearched | ?unresearched | |
| Colpomenia peregrina (Scytosiphonaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Colpomenia sinuosa (Scytosiphonaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Colpomenia tuberculata (Scytosiphonaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Colubrina asiatica (Rhamnaceae) | anapanapa | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Colubrina oppositifolia (Rhamnaceae) | kauila, kauwila | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Colutea arborescens (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Colvillea racemosa (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Combretum bracteosum (Combretaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Combretum ovalifolium (Combretaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Commelina africana (Commelinaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Commelina benghalensis (Commelinaceae) | Benghal dayflower, dayflower, hairy honohono, hairy honohono, hairy wandering Jew, Indian dayflower, wandering Jew | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Commelina communis (Commelinaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Commelina diffusa (Commelinaceae) | commelina, dayflower, honohono, honohono wai, mākolokolo, spiderwort, wandering Jew | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Commelina obliqua (Commelinaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Commersonia bartramia (Sterculiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Complaya trilobata (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Congea griffithiana (Verbenaceae) | congea, pink sandpaper vine, shower orchid | NOT native to Hawaii | ?unresearched | ?unresearched |
| Congea tomentosa (Verbenaceae) | shower orchid | NOT native to Hawaii | ?unresearched | ?unresearched |
| Conicosia pugioniformis (Aizoaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Coniogramme pilosa (Pteridaceae) | loulu | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Conium maculatum (Apiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Conocarpus erecta (Combretaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Conocarpus erectus (Combretaceae) | button mangrove, buttonwood, sea mulberry | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Conringia orientalis (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Convallaria majalis (Ruscaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Convolvulus arvensis (Convolvulaceae) | bindweed, convolvulus, field bindweed | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Convolvulus spp. (Convolvulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Conyza aegyptiaca (Asteraceae) | fleabane | NOT native to Hawaii | ?unresearched | ?unresearched |
| Conyza albida (Asteraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Conyza bilbaoana (Asteraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Conyza bonariensis (Asteraceae) | bonar horseweed, flax-leaf fleabane, hairy fleabane, hairy horseweed, lani wela, wavy-leaf fleabane | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Conyza canadensis (Asteraceae) | butterweed, Canadian fleabane, Canadian horseweed, fleabane, hairy horseweed, hogweed, horseweed, lani wela | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Conyza canadensis var. canadensis (Asteraceae) | horseweed, lani wela | NOT native to Hawaii | ?unresearched | ?unresearched |
| Conyza canadensis var. pusilla (Asteraceae) | horseweed, lani wela | NOT native to Hawaii | ?unresearched | ?unresearched |
| Conyza leucantha (Asteraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Conyza parva (Asteraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Conyza primulifolia (Asteraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Conyza spp. (Asteraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Conyza sumatrensis (Asteraceae) | broadleaf fleabane, fleabane, tall fleabane | NOT native to Hawaii | ?unresearched | ?unresearched |
| Copaifera langsdorffii (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Copernicia cowellii (Arecaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Copernicia hospita (Arecaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Coprosma cymosa (Rubiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Coprosma elliptica (Rubiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Coprosma ernodeoides (Rubiaceae) | kukaenene | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Coprosma foliosa (Rubiaceae) | pilo | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Coprosma granadensis (Rubiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Coprosma kauensis (Rubiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Coprosma longifolia (Rubiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Coprosma menziesii (Rubiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Coprosma montana (Rubiaceae) | pilo | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Coprosma ochracea (Rubiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Coprosma pubens (Rubiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Coprosma repens (Rubiaceae) | looking glass plant | NOT native to Hawaii | ?unresearched | ?unresearched |
| Coprosma rhynchocarpa (Rubiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Coprosma robusta (Rubiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Coprosma sp. (Rubiaceae) | pilo | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Coprosma stephanocarpa (Rubiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Coprosma ternata (Rubiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Coprosma waimeae (Rubiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Corchorus aestuans (Tiliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Corchorus olitorius (Tiliaceae) | Jew's mallow, jute, Nalta jute, tossa jute | NOT native to Hawaii | ?unresearched | ?unresearched |
| Corchorus trilocularis (Tiliaceae) | native jute, three locule corchorus, wild jute | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cordia alliodora (Boraginaceae) | cypre, Ecuador laurel, laurel, salmwood, Spanish elm | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cordia curassavica (Boraginaceae) | black sage, wild sage | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cordia dichotoma (Boraginaceae) | clammy cherry, fragrant manjack, Indian cherry, sebesten | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cordia gerascanthus (Boraginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cordia glabra (Boraginaceae) | broad-leaved cordia | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cordia lutea (Boraginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cordia sebestena (Boraginaceae) | geiger tree, geigertree, kou haole, large-leaf geigertree | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cordia subcordata (Boraginaceae) | kou | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cordyline australis (Agavaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cordyline fruticosa (Agavaceae) | ti leaf | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Coreopsis basalis (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Coreopsis lanceolata (Asteraceae) | garden coreopsis, ko‘oko‘olau haole, kookoolau haole, lanceleaf tickseed, tickseed | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Coriandrum sativum (Apiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Corispermum americanum var. rydbergii (Chenopodiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Corispermum nitidum (Chenopodiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cornus alba (Cornaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cornus amomum (Cornaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cornus capitata (Cornaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cornus drummondii (Cornaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cornus mas (Cornaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cornus obliqua (Cornaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cornus racemosa (Cornaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cornus sanguinea (Cornaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cornus sericea (Cornaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cornus sericea subsp. sericea (Cornaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cornus spp. (Cornaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Coronilla varia (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Coronopus didymum (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Coronopus didymus (Brassicaceae) | bittercress, swine cress, swinecress, twin cress, wart cress | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Coronopus integrifolius (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Coronopus squamatus (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Corrigiola litoralis (Caryophyllaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cortaderia jubata (Poaceae) | Andean pampas grass, jubata grass, pampas grass, pink pampas grass, purple pampas grass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cortaderia jubata and Cortaderia selloana (Poaceae) | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Cortaderia richardii (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cortaderia selloana (Poaceae) | pampas grass, silver pampas grass, Uruguayan pampas grass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cortaderia sp. (Poaceae) | pampas grass | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cortaderia splendens (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Corylus americana (Betulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Corylus avellana (Betulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Corymbia calophylla (Myrtaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Corymbia citriodora (Myrtaceae) | citron-scent gum, lemon-scented gum, spotted gum | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Corymbia ficifolia (Myrtaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Corymbia gummifera (Myrtaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Corymbia sp. (Myrtaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Corymbia spp. (Myrtaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Corymbia torelliana (Myrtaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Corynephorus canescens (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Corynocarpus laevigatus (Corynocarpaceae) | karakara nut, New Zealand laurel | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Corypha utan (Arecaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cosmos bipinnatus (Asteraceae) | cosmos, Mexican aster | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cosmos caudatus (Asteraceae) | cosmos | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cosmos sp. (Asteraceae) | cosmos | (unresearched) | ?unresearched | ?unresearched |
| Cosmos sulphureus (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Costus afer (Costaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Costus comosus (Costaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Costus dubius (Costaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Costus laevis (Costaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Costus malortieanus (Costaceae) | spiral ginger | NOT native to Hawaii | ?unresearched | ?unresearched |
| Costus productus (Costaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Costus pulverulentus (Costaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Costus sericeus (Costaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Costus speciosus (Costaceae) | canereed, crape ginger, crepe ginger, Malay ginger, spiral flag, wild ginger | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Costus tapenbeckianus (Costaceae) | costus | NOT native to Hawaii | ?unresearched | ?unresearched |
| Costus woodsonii (Costaceae) | scarlet spiral flag | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cotoneaster aff. harrovianus (Rosaceae) | tree cotoneaster | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cotoneaster bullatus (Rosaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cotoneaster divaricata (Rosaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cotoneaster divaricatus (Rosaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cotoneaster franchetii (Rosaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cotoneaster glaucophyllus (Rosaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cotoneaster glaucophyllus f. serotinus (Rosaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cotoneaster harrovianus (Rosaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cotoneaster horizontalis (Rosaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cotoneaster integrifolius (Rosaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cotoneaster lacteus (Rosaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cotoneaster lucidus (Rosaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cotoneaster microphyllus (Rosaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cotoneaster multiflorus (Rosaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cotoneaster pannosa (Rosaceae) | cotoneaster | (unresearched) | ?unresearched | ?unresearched |
| Cotoneaster pannosus (Rosaceae) | cotoneaster, silver-leaf cotoneaster | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cotoneaster rotundifolius (Rosaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cotoneaster simonsii (Rosaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cotoneaster sp. (Rosaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cotoneaster spp. (Rosaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cotoneaster submultiflorus (Rosaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cotoneaster tenuipes (Rosaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cotoneaster tomentosus (Rosaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cotula australis (Asteraceae) | Australian brass buttons, bachelor's button, carrotweed, common cotula | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cotula bipinnata (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cotula coronopifolia (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cotula turbinata (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cotyledon orbiculata (Crassulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Crassocephalum crepidioides (Asteraceae) | crassocephalum, fireweed, redflower ragleaf, thickhead | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Crassula alata var. alata (Crassulaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Crassula ciliata (Crassulaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Crassula decumbens (Crassulaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Crassula ericoides subsp. ericoides (Crassulaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Crassula glomerata (Crassulaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Crassula helmsii (Crassulaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Crassula multicava (Crassulaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Crassula multicava subsp. multicava (Crassulaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Crassula muscosa var. muscosa (Crassulaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Crassula natans (Crassulaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Crassula natans var. minus (Crassulaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Crassula ovata (Crassulaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Crassula sarmentosa var. sarmentosa (Crassulaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Crassula spathulata (Crassulaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Crassula tetragona subsp. robusta (Crassulaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Crassula tetragons (Crassulaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Crassula thunbergiana (Crassulaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Crataegus crus-galli (Rosaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Crataegus monogyna (Rosaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Crataegus oxycantha (Rosaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Crataegus sinaica (Rosaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Crepidomanes draytoniana (Hymenophyllaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Crepidomanes minutum (Hymenophyllaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Crepis capillaris (Asteraceae) | hawk's beard | NOT native to Hawaii | ?unresearched | ?unresearched |
| Crepis foetida (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Crepis foetida subsp. foetida (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Crepis setosa (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Crepis tectorum (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Crepis vesicaria (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Crepis vesicaria subsp. haenseleri (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Crescentia cujete (Bignoniaceae) | calabash, calabash tree, gourd tree, hue tree, la‘amia | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cressa truxillensis (Convolvulaceae) | cressa | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Crinum asiaticum (Liliaceae) | Asiatic poisonbulb, crinum, false spider lily, giant crinum lily, grand crinum, poisonbulb, spider lily | NOT native to Hawaii | ?unresearched | ?unresearched |
| Crinum augustum (Liliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Crinum latifolium var. zeylanicum (Liliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Crinum mauritianum (Liliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Crinum moorei (Liliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Crinum pedunculatum (Liliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Crinum sp. (Liliaceae) | spider lily | NOT native to Hawaii | ?unresearched | ?unresearched |
| Critesion hystrix (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Critesion marinum (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Critesion marinum subsp. glaucum (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Critesion murinum (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Critesion murinum subsp. glaucum (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Critesion murinum subsp. leporinum (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Critesion secalinum (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Crocosmia x crocosmiiflora (Iridaceae) | autumn gold, crocosmia, garden montbretia, montbretia | NOT native to Hawaii | ?unresearched | ?unresearched |
| Crocosmia x_crocosmiiflora (Iridaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Crossandra infundibuliformis (Acanthaceae) | crossandra | NOT native to Hawaii | ?unresearched | ?unresearched |
| Crotalaria agatiflora (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Crotalaria assamica (Fabaceae) | rattle pod | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Crotalaria brevidens (Fabaceae) | rattle pod | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Crotalaria goreensis (Fabaceae) | gamba pea, Gambia pea, rattlepod | NOT native to Hawaii | ?unresearched | ?unresearched |
| Crotalaria incana (Fabaceae) | fuzzy rattle pod, fuzzy rattlebox, fuzzy rattlepod, kolomona, kūkaehoki, woolly rattlepod | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Crotalaria incana subsp. purpurascens (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Crotalaria juncea (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Crotalaria lanceolata (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Crotalaria lanceolata subsp. lanceolata (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Crotalaria linifolia (Fabaceae) | narrow-leaved crotalaria | NOT native to Hawaii | ?unresearched | ?unresearched |
| Crotalaria longirostrata (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Crotalaria lunata (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Crotalaria micans (Fabaceae) | crotalaria | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Crotalaria ochroleuca (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Crotalaria pallida (Fabaceae) | kolomona, pikakani, rattlepod, salts rattlebox, smooth crotalaria, smooth rattle pod, smooth rattlebox, smooth rattlepod, streaked rattlepod, striped crotalaria | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Crotalaria pallida var. obovata (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Crotalaria pumila (Fabaceae) | small rattle pod | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Crotalaria quinquefolia (Fabaceae) | rattlepod | NOT native to Hawaii | ?unresearched | ?unresearched |
| Crotalaria retusa (Fabaceae) | devil bean, devil-bean, rattlebox, rattlepod, wedge-leaf crotalaria, wedge-leaf rattlepod | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Crotalaria sp. (Fabaceae) | rattle pod | NOT native to Hawaii | ?unresearched | ?unresearched |
| Crotalaria spectabilis (Fabaceae) | kolomona, rattlebox, rattlepod, showy crotalaria, showy rattlebox, showy rattlepod | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Crotalaria trichotoma (Fabaceae) | curara-pea | NOT native to Hawaii | ?unresearched | ?unresearched |
| Crotalaria verrucosa (Fabaceae) | blue-flower rattlepod, purple popbush, shack-shack, tooth-leaf rattlepod | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Crotalaria virgulata subsp. grantiana (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Crotalaria zanzibarica (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Croton bonplandianus (Euphorbiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Croton guatamalensis (Euphorbiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Croton guatemalensis (Euphorbiaceae) | copalchi | NOT native to Hawaii | ?unresearched | ?unresearched |
| Croton hirtus (Euphorbiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Crouania mageshimensis (Ceramiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Crouania minutissima (Ceramiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cruciata laevipes (Rubiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Crupina vulgaris (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cryptocarya mannii (Lauraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cryptocoryne beckettii (Araceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cryptomeria japonica (Taxodiaceae) | tsugi pine | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cryptonemia umbraticola (Halymeniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cryptonemia yendoi (Halymeniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cryptostegia grandiflora (Asclepiadaceae) | India rubber vine, Palay rubbervine, panay rubber plant, rubber vine | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cryptostegia madagascariensis (Asclepiadaceae) | Madagascar rubbervine, rubber vine | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cryptostegia madagascariensis var. glaberrima (Asclepiadaceae) | rubber vine | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cryptostegia madagascariensis var. madagascariensis (Asclepiadaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cryptostegia sp. (Asclepiadaceae) | rubber vine | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cryptostegia spp. (Asclepiadaceae) | rubber vine, rubbervine | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cryptotaenia canadensis (Apiaceae) | Canadian honewort, honewort, white chervil | (unresearched) | ?unresearched | ?unresearched |
| Ctenidium decurrens (Hypnaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Ctenidium elegantulum (Hypnaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Ctenitis latifrons (Drynariaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Ctenitis squamigera (Drynariaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cubanola domingensis (Rubiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cucumis anguria (Cucurbitaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cucumis dipsaceus (Cucurbitaceae) | hedgehog cucumber, hedgehog gourd, teasel gourd, tiger's egg | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cucumis melo (Cucurbitaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cucumis metuliferus (Cucurbitaceae) | horned melon | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cucumis myriocarpus (Cucurbitaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cucumis myriocarpus subsp. leptodermis (Cucurbitaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cucumis sativus (Cucurbitaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cucurbita moschata (Cucurbitaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cucurbita pepo (Cucurbitaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Culcita novaeguineae (Culcitaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cunninghamia lanceolata (Taxodiaceae) | China fir | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cupania cinerea (Sapindaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cupaniopsis anacardioides (Sapindaceae) | carrot wood, carrotwood, tuckeroo | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cuphea carthagenensis (Lythraceae) | Colombian cuphea, Colombian waxweed, Columbian cuphea, tarweed | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cuphea carthaginensis (Lythraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cuphea hyssopifolia (Lythraceae) | false heather, Mexican heather | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cuphea ignea (Lythraceae) | cigar flower, firecracker plant, kīkā, pua kīkā | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cuphea llavea (Lythraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cuphea racemosa (Lythraceae) | white cuphea | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cuphea salvadorensis (Lythraceae) | cuphea | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cuphea sp. (Lythraceae) | cuphea | (unresearched) | ?unresearched | ?unresearched |
| Cupressus arizonica (Cupressaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cupressus arizonica var. arizonica (Cupressaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cupressus lusitanica (Cupressaceae) | Arizona cypress, cedar of Goa, Mexican cypress, Portuguese cypress | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cupressus macrocarpa (Cupressaceae) | macrocarpa, Monterey cypress | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cupressus sempervirens (Cupressaceae) | Italian cypress | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cupressus sp. (Cupressaceae) | cypress | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cuscuta approximata (Cuscutaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cuscuta campestris (Cuscutaceae) | dodder, field dodder, five-angled dodder, golden dodder, western field dodder | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cuscuta cassytoides (Cuscutaceae) | African dodder, dodder | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cuscuta epithymum (Cuscutaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cuscuta planiflora (Cuscutaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cuscuta racemosa (Cuscutaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cuscuta sandwichiana (Cuscutaceae) | kaunaoa | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cuscuta spp. (Cuscutaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cuscuta suaveolens (Cuscutaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyanea aculeatiflora (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea acuminata (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea angustifolia (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea arborea (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea asarifolia (Campanulaceae) | haha | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyanea asplenifolia (Campanulaceae) | cyanea, haha | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyanea calycina (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea comata (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea copelandii (Campanulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyanea copelandii subsp. copelandii (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea copelandii subsp. haleakalaensis (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea coriacea (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea crispa (Campanulaceae) | haha | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyanea cylindrocalyx (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea degeneriana (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea dolichopoda (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea dunbariae (Campanulaceae) | haha | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyanea duvalliorum (Campanulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyanea eleeleensis (Campanulaceae) | 'oha | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyanea elliptica (Campanulaceae) | cyanea, haha | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Cyanea fauriei (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea fissa (Campanulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyanea fissa subsp. fissa (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea fissa subsp. gayana (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea floribunda (Campanulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyanea gibsonii (Campanulaceae) | [no common name known] | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyanea giffardii (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea glabra (Campanulaceae) | haha | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyanea grimesiana (Campanulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyanea grimesiana subsp. grimesiana (Campanulaceae) | haha | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyanea grimesiana subsp. obatae (Campanulaceae) | haha | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyanea habenata (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea hamatiflora (Campanulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyanea hamatiflora subsp. carlsonii (Campanulaceae) | haha | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyanea hamatiflora subsp. hamatiflora (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea hardyi (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea hirtella (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea horrida (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea humboldtiana (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea kahiliensis (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea kolekoleensis (Campanulaceae) | haha | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyanea koolauensis (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea kuhihewa (Campanulaceae) | haha | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyanea kunthiana (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea lanceolata (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea leptostegia (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea linearifolia (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea lobata (Campanulaceae) | haha | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyanea lobata subsp. baldwinii (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea lobata subsp. lobata (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea longiflora (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea longissima (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea macrostegia (Campanulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyanea macrostegia subsp. gibsonii (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea macrostegia subsp. macrostegia (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea magnicalyx (Campanulaceae) | [no common names known] | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyanea mannii (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea maritae (Campanulaceae) | [no common names known] | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyanea marksii (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea mauiensis (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea mceldowneyi (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea membranacea (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea minutiflora (Campanulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyanea munroi (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea obtusa (Campanulaceae) | haha | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyanea parvifolia (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea pilosa subsp. longipedunculata (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea pilosa subsp. pilosa (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea pinnatifida (Campanulaceae) | [no common name known] | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyanea platyphylla (Campanulaceae) | 'aku'aku | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyanea pohaku (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea procera (Campanulaceae) | haha | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyanea profuga (Campanulaceae) | [no common name known] | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyanea pseudofauriei (Campanulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyanea purpurellifolia (Campanulaceae) | haha | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyanea pycnocarpa (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea quercifolia (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea recta (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea remyi (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea rivularis (Campanulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyanea salicina (Campanulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyanea scabra (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea sessilifolia (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea shipmanii (Campanulaceae) | haha | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyanea solanacea (Campanulaceae) | haha nui, popolo | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyanea solenocalyx (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea spathulata (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea st.-johnii (Campanulaceae) | haha | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyanea stictophylla (Campanulaceae) | haha | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyanea superba (Campanulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyanea superba subsp. regina (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea superba subsp. superba (Campanulaceae) | haha | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyanea sylvestris (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea tritomantha (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyanea truncata (Campanulaceae) | haha | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyanea undulata (Campanulaceae) | haha | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyanella hyacinthoides (Tecophilaeaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyanotis axillaris (Commelinaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyanotis cristata (Commelinaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyanthillium cinereum (Asteraceae) | little ironweed | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cyathea cooperi (Cyatheaceae) | Australian tree fern, straw tree fern | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cyathula prostrata (Amaranthaceae) | cyathula | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cycas circinalis (Cycadaceae) | sago palm | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cycas media (Cycadaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cycas revoluta (Cycadaceae) | cycad | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cyclamen sp. (Primulaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cyclanthera pedata (Cucurbitaceae) | wild cucumber | (unresearched) | ?unresearched | ?unresearched |
| Cycloloma atriplicifolium (Chenopodiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyclosorus boydiae (Thelypteridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyclosorus cyatheoides (Thelypteridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyclosorus hudsonianus (Thelypteridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyclosorus interruptus (Thelypteridaceae) | neke | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Cyclosorus parasitica (Thelypteridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyclosorus sandwicensis (Thelypteridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyclosorus wailele (Thelypteridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyclospermum leptophyllum (Apiaceae) | fir-leaved celery, marsh parsley, slender celery | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cylindropuntia imbricata (Cactaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cylindropuntia rosea (Cactaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cylindropuntia tunicata (Cactaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cymbalaria muralis (Scrophulariaceae) | coliseum ivy, ivy-leaf toadflax, Kenilworth ivy, pennywort | (unresearched) | ?unresearched | ?unresearched |
| Cymbalaria muralis subsp. muralis (Scrophulariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cymbopogon citratus (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cymbopogon refractus (Poaceae) | barbwire grass, soap grass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cymodocea nodosa (Cymodoceaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cynanchum louiseae (Asclepiadaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cynanchum rossicum (Asclepiadaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cynanchum spp. (Asclepiadaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cynara cardunculus (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cynara cardunulus (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cynara scolymus (Asteraceae) | globe artichoke | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cynara spp. (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cynodon aethiopicus (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cynodon dactylon (Poaceae) | Australian couch, Bahama grass, balama grass, Bermuda grass, couch grass, devil's grass, devilgrass, giant Bermuda grass, grama, Indian doab, mānienie, mānienie haole | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cynodon dactylon var. dactylon (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cynodon nlemfuensis var. nlemfuensis (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cynodon transvaalensis (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cynoglossum amabile (Boraginaceae) | Chinese forget me not, hound's toungue | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cynoglossum creticum (Boraginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cynoglossum officinale (Boraginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cynosurus cristatus (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cynosurus echinatus (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cynosurus spp. (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyperus alopecuroides (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyperus alternifolius (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyperus amuricus (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyperus aromaticus (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyperus articulatus (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyperus brevifolius (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyperus compactus (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyperus compressus (Cyperaceae) | cyperus, flat sedge, summer sedge | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyperus congestus (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyperus cuspidatus (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyperus cyperinus (Cyperaceae) | cyperus, long-headed sedge | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyperus cyperoides (Cyperaceae) | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Cyperus difformis (Cyperaceae) | cyperus, dirty-Dora, one-arm sedge, rice sedge, small-flower umbrella plant, smallflower umbrella sedge, variable flat sedge | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyperus digitatus (Cyperaceae) | digitate cyperus | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cyperus distans (Cyperaceae) | slender cyperus | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cyperus eleusinoides (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyperus entrerianus (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyperus eragrostis (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyperus esculentus (Cyperaceae) | chufa, earth almond, nutgrass, tigernut, watergrass, yellow nut grass, yellow nutsedge | (unresearched) | ?unresearched | ?unresearched |
| Cyperus fauriei (Cyperaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyperus giganteus (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyperus gracilis (Cyperaceae) | mau‘u hunehune, McCoy grass, slender sedge, whisker grass, whisker sedge | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyperus hamulosus (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyperus haspan (Cyperaceae) | sharp edge sedge | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyperus hillebrandii (Cyperaceae) | cyperus | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Cyperus hillebrandii subsp. decipiens (Cyperaceae) | cyperus | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Cyperus hillebrandii subsp. hillebrandii (Cyperaceae) | cyperus | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Cyperus hillebrandii var. decipiens (Cyperaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyperus hillebrandii var. hillebrandii (Cyperaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyperus hypochlorus (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyperus hypochlorus var. brevior (Cyperaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyperus hypochlorus var. hypochlorus (Cyperaceae) | ahuawa | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Cyperus imbricatus (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyperus involucratus (Cyperaceae) | ‘ahu‘awa haole, dwarf papyrus grass, pu‘uka‘a haole, umbrella plant, umbrella sedge | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyperus iria (Cyperaceae) | grasshopper's cyperus, rice flat sedge, ricefield flatsedge, umbrella sedge | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cyperus javanicus (Cyperaceae) | ahu awa | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyperus laevigatus (Cyperaceae) | makaloa | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyperus ligularis (Cyperaceae) | Caribbean sedge, rocket sedge, swamp flatsedge | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cyperus longus (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyperus malaccensis (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyperus metzii (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyperus michelianus (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyperus neokunthianus (Cyperaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyperus odoratus (Cyperaceae) | calingale, fragrant flatsedge, kili‘o‘opu, kiolohia, mau‘u pu‘uka‘a, pu‘uka‘a, pu‘uko‘a, pūko‘a, torulinium sedge | (unresearched) | ?unresearched | ?unresearched |
| Cyperus papyrus (Cyperaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Cyperus pennatiformis (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyperus pennatiformis var. bryanii (Cyperaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyperus pennatiformis var. pennatiformis (Cyperaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyperus phleoides (Cyperaceae) | cyperus | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Cyperus phleoides var. hawaiiensis (Cyperaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyperus phleoides var. phleoides (Cyperaceae) | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Cyperus pilosus (Cyperaceae) | fuzzy flat sedge | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyperus polystachyos (Cyperaceae) | pycreus | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Cyperus prolifer (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyperus pumilus (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyperus reflexus (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyperus rockii (Cyperaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyperus rotundus (Cyperaceae) | cocograss, kili‘o‘opu, mau‘u mokae, nut grass, nut sedge, purple nut sedge, purple nutsedge, red nut sedge | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyperus sandwicensis (Cyperaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyperus sanguinolentus (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyperus sp. (Cyperaceae) | sedge | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Cyperus sphacelatus (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyperus surinamensis (Cyperaceae) | tropical flatsedge | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cyperus tenellus (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyperus tenuiflorus (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyperus trachysanthos (Cyperaceae) | pu'uka'a, puukaa | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyperus tuberosus (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyperus ustulatus (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyperus vorsteri (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyrtandra biserrata (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra calpidicarpa (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra confertiflora (Gesneriaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyrtandra confertiflora var. confertiflora (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra confertiflora var. obovata (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra cordifolia (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra crenata (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra cyaneoides (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra dentata (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra ferripilosa (Gesneriaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyrtandra filipes (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra garnotiana (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra giffardii (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra gracilis (Gesneriaceae) | ha'iwale | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyrtandra grandiflora (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra grayana (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra grayi (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra halawensis (Gesneriaceae) | [no common name known] | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyrtandra hashimotoi (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra hawaiensis (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra heinrichii (Gesneriaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyrtandra hematos (Gesneriaceae) | ha'iwale | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyrtandra kalichii (Gesneriaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyrtandra kalihii (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra kamoolaensis (Gesneriaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyrtandra kauaiensis (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra kaulantha (Gesneriaceae) | ha'iwale | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyrtandra kealiae subsp. kealiae (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra kealiae subsp. urceolata (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra kohalae (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra laxiflora (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra lessoniana (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra limahuliensis (Gesneriaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyrtandra longifolia (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra lydgatei (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra lysiosepala (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra macraei (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra macrocalyx (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra menziesii (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra munroi (Gesneriaceae) | [no common names known] | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyrtandra nanawaleensis (Gesneriaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyrtandra oenobarba (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra olona (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra oxybapha (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra paliku (Gesneriaceae) | ha'iwale | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyrtandra paludosa (Gesneriaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyrtandra paludosa var. microcarpa (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra paludosa var. paludosa (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra pickeringii (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra platyphylla (Gesneriaceae) | ilihia | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyrtandra polyantha (Gesneriaceae) | ha'iwale | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyrtandra procera (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra procera x grayana (Gesneriaceae) | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Cyrtandra propinqua (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra pruinosa (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra rivularis (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra sandwicensis (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra sessilis (Gesneriaceae) | ha'iwale | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyrtandra sp. (Gesneriaceae) | cyrtandra | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Cyrtandra spathulata (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra subumbellata (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra tintinnabula (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra viridiflora (Gesneriaceae) | ha'iwale | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyrtandra wagneri (Gesneriaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyrtandra waianaeensis (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtandra wainihaensis (Gesneriaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyrtandra waiolani (Gesneriaceae) | [no common name known] | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Cyrtandra wawrae (Gesneriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtococcum deltoideum (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyrtococcum oxyphyllum (Poaceae) | long-leaf cyrtococcum grass | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cyrtococcum patens (Poaceae) | bowgrass | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cyrtococcum trigonum (Poaceae) | short-leaf cyrtococcum | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cyrtomium caryotideum (Dryopteridaceae) | kaapeape | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Cyrtomium falcatum (Dryopteridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cyrtopus setosus (Cyrtopodaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cyrtostachys renda (Arecaceae) | lipstick palm, maharajah palm, sealing wax palm | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cystopteris douglasii (Athyriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cystopteris sandwicensis (Athyriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Cytisus multiflorus (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cytisus palmensis (Fabaceae) | broom, tagasaste | NOT native to Hawaii | ?unresearched | ?unresearched |
| Cytisus scoparius (Fabaceae) | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Cytisus scoparius subsp. scoparius (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Cytisus striatus (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dactylis glomerata (Poaceae) | barnyard grass, cocksfoot, cockspur, orchard grass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Dactyloctenium aegyptium (Poaceae) | beach wiregrass, button grass, coast button grass, comb fringe grass, crowfoot grass, duck grass, Durban crowfoot, Egyptian grass, finger comb grass, four-finger grass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Dactyloctenium australe (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dahlia coccinea (Asteraceae) | dahlia | NOT native to Hawaii | ?unresearched | ?unresearched |
| Dahlia imperialis (Asteraceae) | dahlia | NOT native to Hawaii | ?unresearched | ?unresearched |
| Dalbergia latifolia (Fabaceae) | black rosewood, blackwood, Bombay blackwood, East Indian rosewood, Indian blackwood, Indian rosewood, Malabar rosewood, shisham | NOT native to Hawaii | ?unresearched | ?unresearched |
| Dalbergia sissoo (Fabaceae) | Indian dalbergia, Indian rosewood, shisham, sissoo, sisu | NOT native to Hawaii | ?unresearched | ?unresearched |
| Dalechampia scandens (Euphorbiaceae) | spurgecreeper | NOT native to Hawaii | ?unresearched | ?unresearched |
| Daltonia baldwinii (Hookeriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Daltonia contorta (Hookeriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Daltonia pseudostenophylla (Hookeriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Daltonia rufescens (Hookeriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Damasonium minus (Alismataceae) | (unresearched) | ?unresearched | ?unresearched | |
| Danaus plexippus (Nymphaeaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Danthonia pilosa (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Danthonia semiannularis (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Daphne laureola (Thymelaeaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Daphne mezereum (Thymelaeaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dasya corymbifera (Dasyaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dasya iridescens (Dasyaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dasyscypha willkommii (Hyaloscyphaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Datura candida (Solanaceae) | angel's trumpet | (unresearched) | ?unresearched | ?unresearched |
| Datura ferox (Solanaceae) | fierce thorn-apple, large thorn-apple, long-spine thorn-apple | NOT native to Hawaii | ?unresearched | ?unresearched |
| Datura inoxia (Solanaceae) | angel's trumpet, downy thorn-apple, Indian-apple, sacred datura, thorn apple | NOT native to Hawaii | ?unresearched | ?unresearched |
| Datura leichhardtii (Solanaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Datura metel (Solanaceae) | cornucopia, datura, downy thorn-apple, Hindu datura, Hindu thorn-apple, hoary thorn-apple, horn-of-plenty, jimson weed, metel, purple thorn-apple, thorn apple | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Datura sp. (Solanaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Datura stramonium (Solanaceae) | datura, jimson weed, kīkānia, kīkānia haole, lā‘au hānō, moonflower, purple thorn-apple, thorn apple | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Datura wrightii (Solanaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Daucus carota (Apiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Daucus carotus (Apiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Daucus carotus subsp. sativus (Apiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Delairea odorata (Asteraceae) | African ivy, Cape ivy, cape ivy, climbing groundsel, German ivy, Italian ivy, parlor ivy | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Delissea fallax (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Delissea laciniata (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Delissea lanaiensis (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Delissea lauliiana (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Delissea niihauensis subsp. kauaiensis (Campanulaceae) | [no common name known] | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Delissea niihauensis subsp. niihauensis (Campanulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Delissea parviflora (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Delissea rhytidosperma (Campanulaceae) | [no common name known] | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Delissea rivularis (Campanulaceae) | oha | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Delissea sinuata (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Delissea sp. (Campanulaceae) | delissea | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Delissea subcordata (Campanulaceae) | 'oha | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Delissea undulata (Campanulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Delissea undulata subsp. undulata (Campanulaceae) | [no common name known] | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Delonix decaryi (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Delonix regia (Fabaceae) | false acacia, flambouyant, flamboyant, flame tree, ‘ohai ‘ula, peacock flower, poinciana, red tree, royal poinciana, royal ponciana | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Dendrobium anosmum (Orchidaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dendrobium moniliforme (Orchidaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dendrobium sp. (Orchidaceae) | orchid | NOT native to Hawaii | ?unresearched | ?unresearched |
| Dennstaedtia davallioides (Dennstaedtiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dentella repens (Rubiaceae) | dentella | NOT native to Hawaii | ?unresearched | ?unresearched |
| Deparia fenzliana (Athyriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Deparia kaalaana (Athyriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Deparia marginalis (Athyriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Deparia petersenii (Athyriaceae) | deparia | NOT native to Hawaii | ?unresearched | ?unresearched |
| Deparia petersonii (Athyriaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Deparia prolifera (Athyriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Derbesia fastigiata (Bryopsidaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Derbesia tenuissima (Bryopsidaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Derris elliptica (Fabaceae) | derris, poison vine, tubaroot | NOT native to Hawaii | ?unresearched | ?unresearched |
| Derris indica (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Derris malaccensis (Fabaceae) | New Guinea creeper, tubaroot | NOT native to Hawaii | ?unresearched | ?unresearched |
| Deschampsia australis (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Deschampsia cespitosa var. parviflora (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Deschampsia flexuosa (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Deschampsia nubigena (Poaceae) | hairgrass | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Descurainia pinnata (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Descurainia richardsonii (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Descurainia sophia (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Desmanthus pernambucanus (Fabaceae) | slender mimosa | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Desmanthus virgatus (Fabaceae) | slender mimosa, virgate mimosa | NOT native to Hawaii | ?unresearched | ?unresearched |
| Desmazeria marina (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Desmazeria rigida (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Desmodium adscendens (Fabaceae) | strongback, tick clover, tick trefoil, tropical clover, zarzabacoa galana | NOT native to Hawaii | ?unresearched | ?unresearched |
| Desmodium gangeticum (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Desmodium glabrum (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Desmodium heterocarpon (Fabaceae) | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Desmodium heterophyllum (Fabaceae) | hetero, Spanish clover | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Desmodium incanum (Fabaceae) | ka‘imi, kaimi clover, Spanish clover, tick trefoil | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Desmodium intortum (Fabaceae) | tick clover | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Desmodium nicaraguense (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Desmodium sandwicense (Fabaceae) | spanish clover | (unresearched) | ?unresearched | ?unresearched |
| Desmodium scorpiurus (Fabaceae) | scorpion ticktrefoil | NOT native to Hawaii | ?unresearched | ?unresearched |
| Desmodium sp. (Fabaceae) | clover | NOT native to Hawaii | ?unresearched | ?unresearched |
| Desmodium strigillosum (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Desmodium tortuosum (Fabaceae) | dixie ticktrefoil, Florida beggarweed, Spanish clover | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Desmodium triflorum (Fabaceae) | creeping tick trefoil, three-flower beggarweed, tick clover, tropical trefoil | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Desmodium uncinatum (Fabaceae) | silverleaf desmodium, Spanish clover, Spanish tick-clover | NOT native to Hawaii | ?unresearched | ?unresearched |
| Deutzia scabra (Hydrangeaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dianella caerulea (Liliaceae) | blue flax-lily, cerulean flaxlily | NOT native to Hawaii | ?unresearched | ?unresearched |
| Dianella sandwicensis (Liliaceae) | ukiuki | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Dianthus armeria (Caryophyllaceae) | Deptford pink | NOT native to Hawaii | ?unresearched | ?unresearched |
| Dianthus armeria subsp. armeria (Caryophyllaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dianthus barbatus (Caryophyllaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Dianthus caryophyllus (Caryophyllaceae) | carnation | NOT native to Hawaii | ?unresearched | ?unresearched |
| Dianthus cretaceus (Caryophyllaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dianthus imereticus (Caryophyllaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dianthus plumarius (Caryophyllaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Diascia sp. (Scrophulariaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Diatoma ehrenbergii (Rhizophoraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dichanthelium cynodon (Poaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dichanthelium hillebrandianum (Poaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dichanthelium isachnoides (Poaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dichanthelium koolauense (Poaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dichanthium annulatum (Poaceae) | Angleton grass, bluestem, Diaz bluestem, Hindi grass, Kleberg bluestem, marvel grass, ringed dichanthium, sheda grass, vunda blue grass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Dichanthium aristatum (Poaceae) | Angleton bluestem, awned dichanthium, bluestem, Wilder grass, wilder grass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Dichanthium caricosum (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dichanthium sericeum (Poaceae) | Australian bluestem | (unresearched) | ?unresearched | ?unresearched |
| Dichelachne crinita (Poaceae) | dichelachne | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Dichondra micrantha (Convolvulaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Dichorisandra thyrsiflora (Commelinaceae) | blue ginger | NOT native to Hawaii | ?unresearched | ?unresearched |
| Dichotomaria marginata (Galaxauraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dichotomaria obtusata (Galaxauraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dichromena ciliata (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dichrostachys cinerea (Fabaceae) | acacia Saint Domingue, aroma, Chinese lantern tree, Kalahari Christmas tree, marabou-thorn, marabú, Saint Domingue, Sen Domeng, sickle bush | NOT native to Hawaii | ?unresearched | ?unresearched |
| Dicliptera chinensis (Acanthaceae) | dicliptera, double folding wing plant | NOT native to Hawaii | ?unresearched | ?unresearched |
| Dicranella exilis (Dicranaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dicranella hawaiica (Dicranaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dicranella hawaiica var. hawaiica (Dicranaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dicranella hawaiica var. tomentella (Dicranaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dicranella hochreuteri (Dicranaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dicranella hochreutineri (Dicranaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dicranella integrifolia (Dicranaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dicranella rigidula (Dicranaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dicranodontium denudatum (Dicranaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dicranodontium falcatum (Dicranaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dicranodontium falcatum var. atrovirens (Dicranaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dicranodontium hawaiicum (Dicranaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dicranodontium hawaiicum var. atrovirens (Dicranaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dicranodontium porodictyon (Dicranaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dicranoloma gracile (Dicranaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dicranopteris linearis (Gleicheniaceae) | uluhe | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Dicranopteris linearis f. emarginata (Gleicheniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dicranopteris linearis f. linearis (Gleicheniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dicranopteris spp. (Gleicheniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dicranoweisia cirrata (Dicranaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dicranum sandwicense (Dicranaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dicranum speirophyllum (Dicranaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dicranum speirophyllum var. breviflagellare (Dicranaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dicranum speirophyllum var. condensatum (Dicranaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dicranum speirophyllum var. elongatum (Dicranaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dicranum speirophyllum var. speirophyllum (Dicranaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dictyopteris australis (Dictyotaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dictyopteris plagiogramma (Dictyotaceae) | (unresearched) | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Dictyosperma album (Arecaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Dictyosphaeria cavernosa (Valoniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dictyosphaeria versluysii (Valoniaceae) | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Dictyota acutiloba (Dictyotaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dictyota ceylanica (Dictyotaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dictyota friabilis (Dictyotaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dictyota sandvicensis (Dictyotaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dictyota spp. (Dictyotaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Didymodon insulanus (Pottiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dieffenbachia seguine (Araceae) | dieffenbachia, dumb cane, dumbplant | NOT native to Hawaii | ?unresearched | ?unresearched |
| Diellia erecta (Aspleniaceae) | asplenium-leaved diellia | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Diellia erecta f. alexandri (Aspleniaceae) | [no common name known] | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Diellia erecta f. erecta (Aspleniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Diellia erecta f. pumila (Aspleniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Diellia falcata (Aspleniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Diellia leucostegioides (Aspleniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Diellia mannii (Aspleniaceae) | [no common name known] | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Diellia pallida (Aspleniaceae) | [no common name known] | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Diellia unisora (Aspleniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Diellia x lauii (Aspleniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Diellia x_lauii (Aspleniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dietes bicolor (Iridaceae) | iris | NOT native to Hawaii | ?unresearched | ?unresearched |
| Dietes grandiflora (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dietes robinsoniana (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Digitalis lanata (Scrophulariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Digitalis purpurea (Scrophulariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Digitaria bicornis (Poaceae) | crab grass, large crab grass, southern crabgrass | NOT native to Hawaii | ?unresearched | ?unresearched |
| Digitaria ciliaris (Poaceae) | crabgrass, fingergrass, Henry's crab grass, Henry's crabgrass, kūkaepua‘a, large crabgrass, smooth crabgrass, southern crabgrass, summer grass, tropical crab grass, tropical finger grass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Digitaria decumbens (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Digitaria didactyla (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Digitaria eriantha (Poaceae) | common finger grass, digit grass, pangola grass, woolly finger grass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Digitaria fuscescens (Poaceae) | creeping kūkaepua‘a, Y grass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Digitaria henryi (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Digitaria horizontalis (Poaceae) | Jamaican crabgrass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Digitaria insularis (Poaceae) | cottongrass, feather-top grass, sourgrass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Digitaria ischaemum (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Digitaria longiflora (Poaceae) | wire crabgrass | NOT native to Hawaii | ?unresearched | ?unresearched |
| Digitaria sanguinalis (Poaceae) | crab finger grass, hairy crabgrass, large crabgrass, summer grass | NOT native to Hawaii | ?unresearched | ?unresearched |
| Digitaria setigera (Poaceae) | kukae puaa | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Digitaria ternata (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Digitaria violascens (Poaceae) | crab grass, purple crabgrass, smooth crabgrass, violet crabgrass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Dillenia indica (Dilleniaceae) | dillenia, elephant-apple | NOT native to Hawaii | ?unresearched | ?unresearched |
| Dillenia reticulata (Dilleniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dillenia suffruticosa (Dilleniaceae) | shrubby dillenia, shrubby simpoh, shrubby simpohlenia | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Dimocarpus longan (Sapindaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Dimorphotheca ecklonis (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dimorphotheca pluvialis (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dimorphotheca spp. (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dioclea megacarpa (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dioclea reflexa (Fabaceae) | sea purse | (unresearched) | ?unresearched | ?unresearched |
| Diodia radula (Rubiaceae) | buttonweed | NOT native to Hawaii | ?unresearched | ?unresearched |
| Diodia sarmentosa (Rubiaceae) | tropical buttonweed | NOT native to Hawaii | ?unresearched | ?unresearched |
| Dionaea muscipula (Droseraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Dioscorea alata (Dioscoreaceae) | uhi | NOT native to Hawaii | ?unresearched | ?unresearched |
| Dioscorea batatas (Dioscoreaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Dioscorea bulbifera (Dioscoreaceae) | aerial yam, air potato, air yam, bitter yam, cheeky yam, hoi, pi‘oi, potato yam, wild yam, yam | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Dioscorea dodecaneura (Dioscoreaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dioscorea oppositifolia (Dioscoreaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Dioscorea pentaphylla (Dioscoreaceae) | pia | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Dioscorea sansibarensis (Dioscoreaceae) | Zanzibar yam | NOT native to Hawaii | ?unresearched | ?unresearched |
| Dioscorea sp. (Dioscoreaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dioscorea species (Dioscoreaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Diospyros discolor (Ebenaceae) | mabolo | NOT native to Hawaii | ?unresearched | ?unresearched |
| Diospyros hillebrandii (Ebenaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Diospyros kaki (Ebenaceae) | oriental persimmon | NOT native to Hawaii | ?unresearched | ?unresearched |
| Diospyros samoensis (Ebenaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Diospyros sandwicensis (Ebenaceae) | lama | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Diplachne fascicularis (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Diplachne fusca (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Diplachne uninervia (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Diplazium arnottii (Athyriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Diplazium esculentum (Athyriaceae) | paca | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Diplazium molokaiense (Athyriaceae) | [no common name known], diplazium | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Diplazium sandwichianum (Athyriaceae) | pohole | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Diplodia gossypina (Sphaeropsidaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Diplolaena dampieri (Rutaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Diplopterygium pinnatum (Gleicheniaceae) | uluhe lau nui | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Diplotaxis muralis (Brassicaceae) | wall rocket | NOT native to Hawaii | ?unresearched | ?unresearched |
| Diplotaxis tenuifolia (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dipogon lignosus (Fabaceae) | Australian pea, dolichos pea, mile-a-minute, okie bean, purple dolichos | (unresearched) | ?unresearched | ?unresearched |
| Dipsacus fullonum (Dipsacaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dipsacus fullonum subsp. fullonum (Dipsacaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dipsacus fullonum subsp. sylvestris (Dipsacaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dipsacus laciniatus (Dipsacaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dipsacus species (Dipsacaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dipsacus spp. (Dipsacaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dipsacus sylvestris (Dipsacaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Disa bracteata (Orchidaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dischisma arenarium (Scrophulariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dischisma capitatum (Scrophulariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Disporopsis jinfushanensis (Ruscaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Disporum megalanthum (Colchicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dissochondrus biflorus (Poaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dissotis rotundifolia (Melastomataceae) | dissotis, pink lady, Spanish shawl | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Distephanus populifolius (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Distichium capillaceum (Ditrichaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Distichlis spicata (Poaceae) | distichlis, saltgrass | NOT native to Hawaii | ?unresearched | ?unresearched |
| Distichophyllum freycinetii (Hookeriaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Distichophyllum freycinetii var. crasse-turgescens (Hookeriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Distichophyllum freycinetii var. crasseturgescens (Hookeriaceae) | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Distichophyllum freycinetii var. freycinetii (Hookeriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Distichophyllum paradoxum (Hookeriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Distromium flabellatum (Dictyotaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dittrichia graveolens (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dittrichia viscosa (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dodonaea viscosa (Sapindaceae) | aalii | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Dombeya wallichii (Sterculiaceae) | tropical hydrangea | (unresearched) | ?unresearched | ?unresearched |
| Doodia kunthiana (Blechnaceae) | okupukupu | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Doodia lyonii (Blechnaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dopatrium junceum (Scrophulariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dorstenia contrajerva (Moraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Doryopteris angelica (Sinopteridaceae) | [no common name known] | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Doryopteris decipiens (Sinopteridaceae) | iwaiwa | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Doryopteris decora (Sinopteridaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Doryopteris subdecipiens (Sinopteridaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Doryopteris takeuchii (Sinopteridaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dotyella hawaiiensis (Delesseriaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dotyella irregularis (Delesseriaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dovyalis caffra (Flacourtiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dovyalis hebecarpa (Flacourtiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Draba verna (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dracaena concinna (Agavaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dracaena draco (Agavaceae) | dragon tree | NOT native to Hawaii | ?unresearched | ?unresearched |
| Dracaena fragrans (Agavaceae) | dragon flower, fragrant dracaena, pleomele | NOT native to Hawaii | ?unresearched | ?unresearched |
| Dracaena fragrans cv. Massangeana (Agavaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dracaena marginata (Agavaceae) | money tree | NOT native to Hawaii | ?unresearched | ?unresearched |
| Dracaena reflexa (Agavaceae) | dracaena | NOT native to Hawaii | ?unresearched | ?unresearched |
| Dracaena sp. (Agavaceae) | dracaena | (unresearched) | ?unresearched | ?unresearched |
| Drepanostachyum falcatum (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Drosanthemum candens (Aizoaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Drosera anglica (Droseraceae) | English sundew, mikinalo | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Drosera filiformis var. filiformis (Droseraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Drymaria cordata (Caryophyllaceae) | drymaria, pilipili, pipili, tropical chickweed, West Indian chickweed | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Drymaria cordata var. pacifica (Caryophyllaceae) | pilipili | NOT native to Hawaii | ?unresearched | ?unresearched |
| Dryopteris crinalis var. crinalis (Dryopteridaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dryopteris crinalis var. podosorus (Dryopteridaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dryopteris filix-mas (Dryopteridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dryopteris fusco-atra (Dryopteridaceae) | dryopteris, ii | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Dryopteris fusco-atra var. fusco-atra (Dryopteridaceae) | dryopteris, ii | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Dryopteris fusco-atra var. lamoureuxii (Dryopteridaceae) | dryopteris, ii | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Dryopteris glabra (Dryopteridaceae) | hohiu, kilau | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Dryopteris glabra var. alboviridis (Dryopteridaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dryopteris glabra var. flynnii (Dryopteridaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dryopteris glabra var. glabra (Dryopteridaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dryopteris glabra var. hobdyana (Dryopteridaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dryopteris glabra var. nuda (Dryopteridaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dryopteris glabra var. pusilla (Dryopteridaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dryopteris glabra var. soripes (Dryopteridaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dryopteris hawaiiensis (Dryopteridaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dryopteris mauiensis (Dryopteridaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dryopteris podosorus var. podosorus (Dryopteridaceae) | [no common name known] | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Dryopteris sandwicensis (Dryopteridaceae) | dryopteris | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Dryopteris sp. (Dryopteridaceae) | dryopteris | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Dryopteris subbipinnata (Dryopteridaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dryopteris tetrapinnata (Dryopteridaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dryopteris unidentata (Dryopteridaceae) | 'akole | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Dryopteris unidentata var. paleacea (Dryopteridaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dryopteris unidentata var. unidentata (Dryopteridaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dryopteris wallichiana (Dryopteridaceae) | laukahi | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Duabanga grandiflora (Sonneratiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dubautia arborea (Asteraceae) | kupaoa | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Dubautia ciliolata (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dubautia ciliolata subsp. ciliolata (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dubautia ciliolata subsp. glutinosa (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dubautia dolosa (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dubautia herbstobatae (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dubautia imbricata subsp. acronaea (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dubautia imbricata subsp. imbricata (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dubautia kenwoodii (Asteraceae) | [no common name known] | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Dubautia knudsenii subsp. filiformis (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dubautia knudsenii subsp. knudsenii (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dubautia knudsenii subsp. nagatae (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dubautia laevigata (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dubautia latifolia (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dubautia laxa (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dubautia laxa subsp. bryanii (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dubautia laxa subsp. hirsuta (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dubautia laxa subsp. laxa (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dubautia laxa subsp. pseudoplantaginea (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dubautia linearis (Asteraceae) | kupaoa | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Dubautia linearis subsp. hillebrandii (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dubautia linearis subsp. linearis (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dubautia linearis subsp. opposita (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dubautia menziesii (Asteraceae) | kupaoa | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Dubautia microcephala (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dubautia paleata (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dubautia pauciflorula (Asteraceae) | na'ena'e | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Dubautia plantaginea (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dubautia plantaginea subsp. humilis (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dubautia plantaginea subsp. magnifolia (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dubautia plantaginea subsp. plantaginea (Asteraceae) | kupaoa | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Dubautia platyphylla (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dubautia raillardioides (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dubautia reticulata (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dubautia scabra (Asteraceae) | kupaoa | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Dubautia scabra subsp. leiophylla (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dubautia scabra subsp. scabra (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dubautia scabra x menziesii (Asteraceae) | kupaoa hybrid | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Dubautia sherffiana (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dubautia sp. (Asteraceae) | kupaoa | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Dubautia syndetica (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dubautia waialealae (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Dubautia waianapanapaensis (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Duchesnea indica (Rosaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dudresnaya babbittiana (Dumontiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dudresnaya hawaiiensis (Dumontiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dudresnaya littleri (Dumontiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Duranta erecta (Verbenaceae) | duranta, golden dewdrop, golden eardrops, pigeon-berry, sky-flower | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Duranta repens (Verbenaceae) | golden dewdrop | (unresearched) | ?unresearched | ?unresearched |
| Durio zibethinus (Bombacaceae) | durian | (unresearched) | ?unresearched | ?unresearched |
| Dypsis decaryi (Arecaceae) | Madagascar three-sided palm, triangle palm | (unresearched) | ?unresearched | ?unresearched |
| Dypsis lutescens (Arecaceae) | areca palm, butterfly palm, cane palm, golden-yellow palm, yellow butterfly palm, yellow palm | (unresearched) | ?unresearched | ?unresearched |
| Dysphania pumilio (Chenopodiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Dyssodia tenuiloba (Asteraceae) | lemon drop | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Ecballium elaterium (Cucurbitaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eccremocarpus scaber (Bignoniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Echeveria sp. (Crassulaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Echinocactus grusonii (Cactaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Echinochloa colona (Poaceae) | awnless barnyard grass, corn panic grass, Deccan grass, jungle rice, jungle ricegrass, jungle-rice, millet-rice, pigeon millet, shama millet | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Echinochloa colonum (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Echinochloa crus-galli (Poaceae) | barnyard grass, cockspur grass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Echinochloa crus-pavonis (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Echinochloa crusgalli subsp. crus-pavonis (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Echinochloa elliptica (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Echinochloa esculenta (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Echinochloa frumentacea (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Echinochloa glabrescens (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Echinochloa muricata var. microstachya (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Echinochloa oryzoides (Poaceae) | early barnyard grass, early water grass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Echinochloa polystachya (Poaceae) | aleman grass, carib grass, creeping rivergrass | NOT native to Hawaii | ?unresearched | ?unresearched |
| Echinochloa polystachya cv. 'Amity' (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Echinochloa pyramidalis (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Echinochloa stagnina (Poaceae) | barnyard grass, burgu grass, hippo grass, long-awn water grass | NOT native to Hawaii | ?unresearched | ?unresearched |
| Echinochloa telmatophila (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Echinocystis lobata (Cucurbitaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Echinodorus bathii (Alismataceae) | (unresearched) | ?unresearched | ?unresearched | |
| Echinodorus bolivianus (Alismataceae) | (unresearched) | ?unresearched | ?unresearched | |
| Echinodorus horemanii (Alismataceae) | (unresearched) | ?unresearched | ?unresearched | |
| Echinodorus intermedius (Alismataceae) | (unresearched) | ?unresearched | ?unresearched | |
| Echinodorus latifolius (Alismataceae) | (unresearched) | ?unresearched | ?unresearched | |
| Echinodorus magdalenensis (Alismataceae) | (unresearched) | ?unresearched | ?unresearched | |
| Echinodorus muricatus (Alismataceae) | (unresearched) | ?unresearched | ?unresearched | |
| Echinodorus osiris (Alismataceae) | (unresearched) | ?unresearched | ?unresearched | |
| Echinodorus paniculatus (Alismataceae) | (unresearched) | ?unresearched | ?unresearched | |
| Echinodorus uruguayensis (Alismataceae) | (unresearched) | ?unresearched | ?unresearched | |
| Echinops sphaerocephalus (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Echium candicans (Boraginaceae) | pride of Madeira, tower of jewels | (unresearched) | ?unresearched | ?unresearched |
| Echium fastuosum (Boraginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Echium plantagineum (Boraginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Echium spp. (Boraginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Echium vulgare (Boraginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eclipta alba (Asteraceae) | false daisy | NOT native to Hawaii | ?unresearched | ?unresearched |
| Eclipta prostrata (Asteraceae) | eclipta, false daisy, swamp daisy, white eclipta | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Eclipta sp. (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ectropothecium arcuatum (Hypnaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Ectropothecium decurrens (Hypnaceae) | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Ectropothecium sandwichense (Hypnaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Ectropothecium tutuilum (Hypnaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Ectropothecium viridifolium (Hypnaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Ectropothecium zollingeri (Hypnaceae) | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Ectropothecium zollingeri var. filicaule (Hypnaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Egeria densa (Hydrocharitaceae) | Brazilian waterweed, Brazilian elodea, Brazilian waterweed, dense waterweed, egeria, leafy elodea | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Ehretia acuminata (Boraginaceae) | kodo wood | NOT native to Hawaii | ?unresearched | ?unresearched |
| Ehretia rigida (Boraginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ehrharta brevifolia var. cuspidata (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ehrharta calycina (Poaceae) | perennial veldt grass | NOT native to Hawaii | ?unresearched | ?unresearched |
| Ehrharta erecta (Poaceae) | panic veldt grass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Ehrharta longiflora (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ehrharta stipoides (Poaceae) | meadow rice grass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Ehrharta villosa (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ehrharta villosa var. maxima (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eichhornia azurea (Pontederiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Eichhornia crassipes (Pontederiaceae) | water hyacinth | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Eichhornia paniculata (Pontederiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Elaeagnus angustifolia (Elaeagnaceae) | elaeagnus, oleaster, Russian-olive, trebizond-date | NOT native to Hawaii | ?unresearched | ?unresearched |
| Elaeagnus multiflora (Elaeagnaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Elaeagnus pungens (Elaeagnaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Elaeagnus triflora (Elaeagnaceae) | (unresearched) | PRESENT in Hawaii | ?unresearched | |
| Elaeagnus umbellata (Elaeagnaceae) | autumn elaeagnus, autumn olive, oleaster, silverberry | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Elaeagnus x reflexa (Elaeagnaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Elaeis guineensis (Arecaceae) | African oil palm, oil palm | NOT native to Hawaii | ?unresearched | ?unresearched |
| Elaeocarpus angustifolius (Elaeocarpaceae) | blue fig, blue marble tree, quandong | NOT native to Hawaii | ?unresearched | ?unresearched |
| Elaeocarpus bifidus (Elaeocarpaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Elaeocarpus carolinensis (Elaeocarpaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Elaeocarpus grandis (Elaeocarpaceae) | blue-marble tree | NOT native to Hawaii | ?unresearched | ?unresearched |
| Elaphoglossum aemulum (Elaphoglossaceae) | laukahi nunui | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Elaphoglossum alatum (Elaphoglossaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Elaphoglossum crassicaule (Elaphoglossaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Elaphoglossum crassifolium (Elaphoglossaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Elaphoglossum fauriei (Elaphoglossaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Elaphoglossum paleaceum (Elaphoglossaceae) | makue | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Elaphoglossum parvisquameum (Elaphoglossaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Elaphoglossum pellucidum (Elaphoglossaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Elaphoglossum sp. (Elaphoglossaceae) | elaphoglossum | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Elaphoglossum spp. (Elaphoglossaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Elaphoglossum wawrae (Elaphoglossaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Elatine triandra (Elatinaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eleocharis acicularis (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eleocharis acutangula (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eleocharis atropurpurea (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eleocharis calva (Cyperaceae) | skikerush | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Eleocharis congesta (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eleocharis dulcis (Cyperaceae) | Chinese waterchestnut, ground-chestnut, waternut | NOT native to Hawaii | ?unresearched | ?unresearched |
| Eleocharis elegans (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eleocharis filiculmis (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eleocharis geniculata (Cyperaceae) | spike rush, spikerush | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Eleocharis interstincta (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eleocharis minuta (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eleocharis obtusa (Cyperaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Eleocharis palustris (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eleocharis pellucida (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eleocharis philippinensis (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eleocharis radicans (Cyperaceae) | spikerush | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Eleocharis sellowiana (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eleocharis sphacelata (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eleocharis spiralis (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Elephantopus mollis (Asteraceae) | elephant's foot, elephantopus, false tobacco, tobacco weed | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Elettaria cardamomum (Zingiberaceae) | cardamom | NOT native to Hawaii | ?unresearched | ?unresearched |
| Eleusine coracana (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eleusine indica (Poaceae) | bullgrass, crabgrass, crow's foot, dog grass, goose foot, goose grass, goosegrass, mānienie ali‘i, wire grass, yard grass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Eleusine tristachya (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eleutheranthera ruderalis (Asteraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Elodea canadensis (Hydrocharitaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Elodea longivaginata (Hydrocharitaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Elodea nuttallii (Hydrocharitaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Elsholtzia ciliata (Lamiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Elsinoe fawcetti (Elsinoaceae) | citrus scab | (unresearched) | ?unresearched | ?unresearched |
| Elymus elongatus subsp. ponticus (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Elymus europaeus (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Elymus repens (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Elytraria imbricata (Acanthaceae) | purple scalystem | NOT native to Hawaii | ?unresearched | ?unresearched |
| Elytrigia elongata (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Elytrigia intermedia (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Elytrigia juncea (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Elytrigia pungens (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Elytrigia repens (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Elytrigia repens var. repens (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Embelia pacifica (Myrsinaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Emex australis (Polygonaceae) | doublegee, spiny emex, three-corner Jack | NOT native to Hawaii | ?unresearched | ?unresearched |
| Emex spinosa (Polygonaceae) | devil's thorn, lesser Jack, spiny emex, spiny threecornerjack | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Emilia coccinea (Asteraceae) | Flora's paintbrush, tasselflower | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Emilia fosbergii (Asteraceae) | Flora's paintbrush, pualele, red sow thistle | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Emilia sonchifolia (Asteraceae) | Cupid's shaving-brush, emilia, Flora's paint brush, purple sow thistle, sow thistle | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Emilia sonchifolia var. javanica (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Emilia sonchifolia var. sonchifolia (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Emilia sp. (Asteraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Encalypta ciliata (Encalyptaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Encalypta rhabdocarpa (Encalyptaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Encalypta sandwicensis (Encalyptaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Encelia farinosa (Asteraceae) | brittle brush | NOT native to Hawaii | ?unresearched | ?unresearched |
| Encephalartos gratus (Zamiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Encephalartos sp. (Zamiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Enchylaena tomentosa (Chenopodiaceae) | Enchylaena | NOT native to Hawaii | PRESENT in Hawaii | ?unresearched |
| Ensete sp. (Musaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ensete spp. (Musaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Entada phaseoloides (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Enterolobium contortisiliquum (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Enterolobium cyclocarpum (Fabaceae) | devil's ear, earpod tree, elephant's ear, elephant's earpod, monkeysoap | NOT native to Hawaii | ?unresearched | ?unresearched |
| Enteromorpha flexuosa (Ulvaceae) | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Enteromorpha intestinalis (Ulvaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Enteropogon mollis (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Entodon plicatus (Entodontaceae) | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Entodon solanderi (Entodontaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Entodon subcuspidatus (Entodontaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Entodontopsis anceps (Stereophyllaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Entosthodon subintegrus (Funariaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Entyloma compositarum (Entylomataceae) | (unresearched) | ?unresearched | ?unresearched | |
| Entyloma sp. (Entylomataceae) | (unresearched) | ?unresearched | ?unresearched | |
| Enydra fluctuans (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Epidendrum sp. (Orchidaceae) | buttonhole orchid | (unresearched) | ?unresearched | ?unresearched |
| Epidendrum x obrienianum (Orchidaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Epidendrum xobrienianum (Orchidaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Epilobium billardierianum (Onagraceae) | willow herb | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Epilobium billardierianum subsp. cinereum (Onagraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Epilobium brunnescens (Onagraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Epilobium ciliatum (Onagraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Epilobium hirsutum (Onagraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Epilobium rotundifolium (Onagraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Epilobium tetragonum subsp. tetragonum (Onagraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Epimedium chlorandrum (Berberidaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Epipactis helleborine (Orchidaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Epiphyllum hookeri (Cactaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Epipremnum aureum (Araceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Epipremnum pinnatum (Araceae) | golden pothos | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Epipremnum pinnatum cv. Aureum (Araceae) | devil's ivy, golden pothos, money plant, pothos, taro vine | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Episcia cupreata (Gesneriaceae) | episcia, flame violet | NOT native to Hawaii | ?unresearched | ?unresearched |
| Episcia reptans (Gesneriaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Equisetum arvense (Equisetaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Equisetum debile (Equisetaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Equisetum hyemale (Equisetaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Equisetum laevigatum (Equisetaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Equisetum ramosissimum (Equisetaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Equisetum ramosissimum subsp. debile (Equisetaceae) | branched scouringrush | NOT native to Hawaii | ?unresearched | ?unresearched |
| Equisetum spp. (Equisetaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Equisetum telmateia (Equisetaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eragrostis amabilis (Poaceae) | bug's egg grass, delicate lovegrass, female grass, Japanese lovegrass, love grass, lovegrass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Eragrostis atropioides (Poaceae) | eragrostis | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Eragrostis atrovirens (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eragrostis barrelieri (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eragrostis brownei (Poaceae) | sheepgrass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Eragrostis brownii (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eragrostis caroliniana (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eragrostis cilianensis (Poaceae) | gray love grass, stink grass, stinkgrass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Eragrostis ciliaris (Poaceae) | gophertail grass, gophertail lovegrass, lovegrass, woolly love grass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Eragrostis cumingii (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eragrostis curvula (Poaceae) | eragrostis | NOT native to Hawaii | ?unresearched | ?unresearched |
| Eragrostis deflexa (Poaceae) | eragrostis | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Eragrostis elliottii (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eragrostis elongata (Poaceae) | clustered lovegrass, long lovegrass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Eragrostis falcata (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eragrostis fosbergii (Poaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Eragrostis grandis (Poaceae) | eragrostis | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Eragrostis japonica (Poaceae) | Japanese lovegrass, pond lovegrass | NOT native to Hawaii | ?unresearched | ?unresearched |
| Eragrostis lehmanniana (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eragrostis leptophylla (Poaceae) | eragrostis | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Eragrostis mauiensis (Poaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Eragrostis mexicana (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eragrostis mexicana subsp. mexicana (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eragrostis mexicana subsp. virescens (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eragrostis minor (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eragrostis monticola (Poaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Eragrostis nigra (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eragrostis parviflora (Poaceae) | small flower love grass, weeping lovegrass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Eragrostis paupera (Poaceae) | dwarf eragrostis | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Eragrostis pectinacea (Poaceae) | Carolina love grass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Eragrostis pilosa (Poaceae) | hairy love grass, India love grass, Indian love grass, soft lovegrass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Eragrostis plana (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eragrostis scabriflora (Poaceae) | Fijian lovegrass | NOT native to Hawaii | ?unresearched | ?unresearched |
| Eragrostis sp. (Poaceae) | eragrostis | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Eragrostis subsecunda (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eragrostis superba (Poaceae) | Wilmann love grass | NOT native to Hawaii | ?unresearched | ?unresearched |
| Eragrostis tenuifolia (Poaceae) | elastic grass, wiry lovegrass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Eragrostis tremula (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Eragrostis unioloides (Poaceae) | Chinese love grass, Chinese lovegrass, eragrostis | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Eragrostis variabilis (Poaceae) | emoloa, kawelu | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Eragrostis whitneyi (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eragrostis xerophila (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Erechtites glomerata (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Erechtites hieracifolia (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Erechtites hieraciifolia (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Erechtites hieraciifolius (Asteraceae) | American burnweed, American fireweed, burnweed, fireweed, Malayan groundsel, pilewort | NOT native to Hawaii | ?unresearched | ?unresearched |
| Erechtites minima (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Erechtites valerianifolia (Asteraceae) | Brazilian fireweed, Ceylon thistle, fireweed, fireweed daisy | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Erechtites valerianifolia f. valerianifolia (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eremocarpus setiger (Euphorbiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eremochloa ophiuroides (Poaceae) | centipede grass, lazy-man's grass | NOT native to Hawaii | ?unresearched | ?unresearched |
| Erica arborea (Ericaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Erica baccans (Ericaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Erica ciliaris (Ericaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Erica cinerea (Ericaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Erica lusitanica (Ericaceae) | Portugese heath | NOT native to Hawaii | PRESENT in Hawaii | ?unresearched |
| Erica melanthera (Ericaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Erica quadrangularis (Ericaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Erica scoparia (Ericaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Erica terminalis (Ericaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Erica tetralix (Ericaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Erica vagans (Ericaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Erigeron bellioides (Asteraceae) | bellorita, fleabane, fleabane daisy | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Erigeron karvinskianus (Asteraceae) | daisy, daisy fleabane, Mexican daisy, seaside daisy | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Eriobotrya japonica (Rosaceae) | Japanese medlar, Japanese plum, loquat | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Eriocaulon buergerianum (Eriocaulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eriocaulon robustius (Eriocaulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eriocaulon sieboldtianum (Eriocaulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eriocaulon truncatum (Eriocaulaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Eriochloa fatmensis (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eriochloa meyeriana (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eriochloa polystachya (Poaceae) | Carib grass, Caribbean cup grass | NOT native to Hawaii | ?unresearched | ?unresearched |
| Eriochloa procera (Poaceae) | tropical cupgrass | NOT native to Hawaii | ?unresearched | ?unresearched |
| Eriochloa punctata (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eriococcus ironsidei (Phyllanthaceae) | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Erodium aureum (Geraniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Erodium botrys (Geraniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Erodium brachycarpum (Geraniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Erodium cicutarium (Geraniaceae) | alfilaria, pin clover | NOT native to Hawaii | ?unresearched | ?unresearched |
| Erodium malacoides (Geraniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Erodium moschatum (Geraniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Erodium spp. (Geraniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Erophila verna (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Erophila verna subsp. praecox (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Erophila verna subsp. verna (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eruca vesicaria (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eruca vesicaria subsp. sativa (Brassicaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Erucastrum gallicum (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eryngium foetidum (Apiaceae) | false coriander, shadow-beni, stinkweed | NOT native to Hawaii | ?unresearched | ?unresearched |
| Eryngium maritimum (Apiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Erysimum cheiranthoides (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Erysimum cheiri (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Erysimum menziesii (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Erysimum menziesii subsp. menziesii (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Erysimum repandum (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Erythrina (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Erythrina americana (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Erythrina berteroana (Fabaceae) | coralbean | NOT native to Hawaii | ?unresearched | ?unresearched |
| Erythrina corallodendrum (Fabaceae) | coraltree, Jamaica coral tree | NOT native to Hawaii | ?unresearched | ?unresearched |
| Erythrina coralloides (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Erythrina crista-galli (Fabaceae) | cock's spur coral tree, coral tree | NOT native to Hawaii | PRESENT in Hawaii | ?unresearched |
| Erythrina eggersii (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Erythrina lanata subsp. occidentalis (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Erythrina sacleuxii (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Erythrina sandwicensis (Fabaceae) | wiliwili | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Erythrina smithiana (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Erythrina stricta (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Erythrina subumbrans (Fabaceae) | December tree | NOT native to Hawaii | ?unresearched | ?unresearched |
| Erythrina variegata (Fabaceae) | NOT native to Hawaii | PRESENT in Hawaii | ?unresearched | |
| Erythrina x sykesii (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Erythroxylum coca (Erythroxylaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Escallonia rubra (Grossulariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eschscholzia californica (Papaveraceae) | California poppy | NOT native to Hawaii | ?unresearched | ?unresearched |
| Etlingera australasica (Zingiberaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Etlingera elatior (Zingiberaceae) | ‘awapuhi ko‘oko‘o, torch ginger | NOT native to Hawaii | ?unresearched | ?unresearched |
| Etlingera punicea (Zingiberaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eucalyptus amygdalina (Myrtaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Eucalyptus botryoides (Myrtaceae) | bangalay | NOT native to Hawaii | ?unresearched | ?unresearched |
| Eucalyptus camaldulensis (Myrtaceae) | Murray red gum, red gum, river gum, river red gum | NOT native to Hawaii | ?unresearched | ?unresearched |
| Eucalyptus citriodora (Myrtaceae) | lemon-scented gum | NOT native to Hawaii | ?unresearched | ?unresearched |
| Eucalyptus cladocalyx (Myrtaceae) | sugar gum | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Eucalyptus cloeziana (Myrtaceae) | Gympie Messmate | NOT native to Hawaii | ?unresearched | ?unresearched |
| Eucalyptus conferruminata (Myrtaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Eucalyptus crebra (Myrtaceae) | narrow-leaved ironbark | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Eucalyptus deglupta (Myrtaceae) | rainbow eucalyptus | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Eucalyptus diversicolor (Myrtaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Eucalyptus dunnii (Myrtaceae) | NOT native to Hawaii | PRESENT in Hawaii | ?unresearched | |
| Eucalyptus globulus (Myrtaceae) | blue gum, southern blue gum | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Eucalyptus gomphocephala (Myrtaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Eucalyptus grandis (Myrtaceae) | flooded gum, grand eucalyptus, rose gum | NOT native to Hawaii | ?unresearched | ?unresearched |
| Eucalyptus lehmanni (Myrtaceae) | bushy yate | NOT native to Hawaii | ?unresearched | ?unresearched |
| Eucalyptus lehmannii (Myrtaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Eucalyptus leucoxylon (Myrtaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Eucalyptus macarthurii (Myrtaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Eucalyptus maculata (Myrtaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Eucalyptus microcorys (Myrtaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Eucalyptus muelleriana (Myrtaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Eucalyptus obliqua (Myrtaceae) | Messmate stringybark | NOT native to Hawaii | ?unresearched | ?unresearched |
| Eucalyptus paniculata (Myrtaceae) | black ironbark, gray ironbark, white ironbark | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Eucalyptus pilularis (Myrtaceae) | blackbutt | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Eucalyptus polyanthemos (Myrtaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Eucalyptus robusta (Myrtaceae) | swamp mahogany | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Eucalyptus rudis (Myrtaceae) | desert gum | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Eucalyptus saligna (Myrtaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Eucalyptus sideroxylon (Myrtaceae) | red ironbark | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Eucalyptus sp. (Myrtaceae) | eucalyptus | NOT native to Hawaii | ?unresearched | ?unresearched |
| Eucalyptus spp. (Myrtaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Eucalyptus tereticornis (Myrtaceae) | forest red gum | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Eucalyptus torelliana (Myrtaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Eucheuma cottonii (Solieriaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eucheuma denticulatum (Solieriaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eucheuma isiforme (Solieriaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Euchiton japonicus (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Euchiton sphaericus (Asteraceae) | euchiton | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Eugenia brasiliensis (Myrtaceae) | Brazilian cherry, Brazilian plum, grumichama, Spanish cherry | NOT native to Hawaii | ?unresearched | ?unresearched |
| Eugenia cumini (Myrtaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eugenia dombeyi (Myrtaceae) | Brazilian plum, grumixameira, Spanish cherry | (unresearched) | ?unresearched | ?unresearched |
| Eugenia jambos (Myrtaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eugenia koolauensis (Myrtaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Eugenia malaccensis (Myrtaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eugenia palumbis (Myrtaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eugenia paniculatum (Myrtaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eugenia reinwardtiana (Myrtaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Eugenia sp. (Myrtaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Eugenia spp. (Myrtaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eugenia uniflora (Myrtaceae) | Barbados cherry, French cherry, pitanga, red Brazil cherry, Surinam cherry | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Eulophia graminea (Orchidaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Euonymus alata (Celastraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Euonymus alatus (Celastraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Euonymus europaea (Celastraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Euonymus europaeus (Celastraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Euonymus fortunei (Celastraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Euonymus japonicus (Celastraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Euonymus nana (Celastraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Euonymus sp. (Celastraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Euonymus spp. (Celastraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eupatorium adenophorum (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eupatorium cannabinum (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eupatorium catarium (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eupatorium lindleyanum (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eupatorium odoratum (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eupatorium riparium (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eupatorium rugosum (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eupatorium spp. (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Euphorbia agraria (Euphorbiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Euphorbia amygdaloides (Euphorbiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Euphorbia australis (Euphorbiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Euphorbia cotinifolia (Euphorbiaceae) | red spurge | NOT native to Hawaii | ?unresearched | ?unresearched |
| Euphorbia cyathophora (Euphorbiaceae) | Christmas bush, dwarf poinsettia, false poinsettia, fire-on-the-mountain, hypocrite plant, Mexican fire plant, Mexican poinsettia, painted leaf, painted leaf spurge, painted spurge, wild poinsettia | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Euphorbia cyparissias (Euphorbiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Euphorbia epithymoides (Euphorbiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Euphorbia esula (Euphorbiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Euphorbia graminea (Euphorbiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Euphorbia haeleeleana (Euphorbiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Euphorbia helioscopia (Euphorbiaceae) | sun spurge, wartweed | NOT native to Hawaii | ?unresearched | ?unresearched |
| Euphorbia heterophylla (Euphorbiaceae) | kaliko, Mexican fireplant, milkweed, painted euphorbia, painted spurge, paintedleaf, wild spurge | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Euphorbia hirta (Euphorbiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Euphorbia humistrata (Euphorbiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Euphorbia lactea (Euphorbiaceae) | candelabra cactus, candelabra spurge, dragon bones, false cactus, hatrack cactus, milkstripe euphorbia, mottled candlestick, mottled spurge | NOT native to Hawaii | ?unresearched | ?unresearched |
| Euphorbia lathyris (Euphorbiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Euphorbia leucocephala (Euphorbiaceae) | Christ child, white-laced euphorbia | NOT native to Hawaii | ?unresearched | ?unresearched |
| Euphorbia leuconeura (Euphorbiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Euphorbia maculata (Euphorbiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Euphorbia milii (Euphorbiaceae) | Christ's plant, Christ's thorn, crown of thorns | NOT native to Hawaii | ?unresearched | ?unresearched |
| Euphorbia myrsinites (Euphorbiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Euphorbia paralias (Euphorbiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Euphorbia peplus (Euphorbiaceae) | petty spurge | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Euphorbia platyphyllos (Euphorbiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Euphorbia pulcherrima (Euphorbiaceae) | Christmas flower, Christmas star, lobsterplant, Mexican flameleaf, painted leaf, poinsettia, yellow poinsettia | NOT native to Hawaii | ?unresearched | ?unresearched |
| Euphorbia segetalis (Euphorbiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Euphorbia spp. (Euphorbiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Euphorbia terracina (Euphorbiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Euphorbia tirucalli (Euphorbiaceae) | African milkbush, finger tree, Indian tree-spurge, milk bush, milk hedge, milkbush, milkhedge, naked lady, pench tree, pencil bush, pencil plant, pencil tree, petroleum plant, rubber euphorbia, skeleton tree, tirucalli | NOT native to Hawaii | ?unresearched | ?unresearched |
| Euphoria longan (Sapindaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Euphoria longana (Sapindaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Euptilocladia magruderi (Rhodomelaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eurhynchium vagans (Brachytheciaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Eurya sandwicensis (Theaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Euryops abrotanifolius (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Euryops multifidus (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eustachys distichophylla (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Eustachys petraea (Poaceae) | pinewoods fingergrass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Euterpe oleracea (Arecaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Evolvulus glomeratus (Convolvulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Evolvulus nummularius (Convolvulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Exocarpos gaudichaudii (Santalaceae) | hulumoa | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Exocarpos luteolus (Santalaceae) | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Exocarpos menziesii (Santalaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Exochorda racemosa (Rosaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Fabronia ciliaris (Fabroniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Fabronia degeneri (Fabroniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Fabronia nietneri (Fabroniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Fagraea berteroana (Loganiaceae) | pua kenikeni | NOT native to Hawaii | ?unresearched | ?unresearched |
| Fagraea ceilanica (Loganiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Fagraea galilae (Loganiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Fagus orientalis (Fagaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Fagus sylvatica (Fagaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Falcataria moluccana (Fabaceae) | batai, bataiwood, Molucca albizia, Moluccan albizia, Moluccan sau | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Fallopia baldschuanica (Polygonaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Fallopia convolvulus (Polygonaceae) | black bindweed, wild buckwheat | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Fallopia japonica (Polygonaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Fallopia japonica var. japonica (Polygonaceae) | Japanese knotweed | (unresearched) | ?unresearched | ?unresearched |
| Fallopia sachalinensis (Polygonaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Fallopia x bohemica (Polygonaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Faramea multiflora (Rubiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Fargesia nitida (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Fatoua villosa (Moraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Feijoa sellowiana (Myrtaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Feldmannia lebelii (Ectocarpaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Felicia petiolata (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ferraria crispa (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ferraria crispa subsp. crispa (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Festuca arundinacea (Poaceae) | festuca | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Festuca bromoides (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Festuca elatior (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Festuca gigantea (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Festuca hawaiiensis (Poaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Festuca pratensis (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Festuca rubra (Poaceae) | red fescue | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Festuca sp. (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Festuca spp. (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ficaria verna (Ranunculaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ficus altissima (Moraceae) | council tree, false banyan, lofty fig | NOT native to Hawaii | ?unresearched | ?unresearched |
| Ficus aurea (Moraceae) | Florida strangler fig | NOT native to Hawaii | ?unresearched | ?unresearched |
| Ficus benghalensis (Moraceae) | banyan, banyan fig, East Indian figtree, Indian banyan, Indian banyan tree, vada tree | NOT native to Hawaii | ?unresearched | ?unresearched |
| Ficus benjamina (Moraceae) | baka, Benjamin tree, Java fig, weeping banyan, weeping fig | NOT native to Hawaii | ?unresearched | ?unresearched |
| Ficus brevifolia (Moraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ficus carica (Moraceae) | common fig, edible fig, fig | NOT native to Hawaii | ?unresearched | ?unresearched |
| Ficus cf. platypoda (Moraceae) | (unresearched) | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Ficus dammaropsis (Moraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ficus deltoidea (Moraceae) | mistletoe fig | NOT native to Hawaii | ?unresearched | ?unresearched |
| Ficus destruens (Moraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ficus elastica (Moraceae) | India rubber fig, India rubber tree, Indian rubber tree, rubber plant, rubber tree | NOT native to Hawaii | ?unresearched | ?unresearched |
| Ficus lyrata (Moraceae) | fiddle leaf fig | NOT native to Hawaii | ?unresearched | ?unresearched |
| Ficus macrophylla (Moraceae) | Moreton Bay fig | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Ficus macrophylla subsp. macrophylla (Moraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ficus microcarpa (Moraceae) | Chinese banyan, Chinese banyan tree, curtain fig, Indian laurel fig, laurel fig, Malay banyan, Malayan banyan | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Ficus natalensis (Moraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ficus neriifolia (Moraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ficus nitida (Moraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ficus nota (Moraceae) | nota ficus, tibig | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Ficus platypoda (Moraceae) | Port Jackson fig | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Ficus platypoda (cf.) (Moraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Ficus platypoda(cf.) (Moraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Ficus prolixa (Moraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ficus pseudopalma (Moraceae) | Philippine fig | NOT native to Hawaii | ?unresearched | ?unresearched |
| Ficus pumila (Moraceae) | creeping fig | NOT native to Hawaii | ?unresearched | ?unresearched |
| Ficus religiosa (Moraceae) | bo tree | NOT native to Hawaii | ?unresearched | ?unresearched |
| Ficus rubiginosa (Moraceae) | littleleaf fig, Port Jackson fig, rusty fig, rusty-leaved fig | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Ficus sp. (Moraceae) | ficus | NOT native to Hawaii | ?unresearched | ?unresearched |
| Ficus spp. (Moraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ficus thonningii (Moraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Filago gallica (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Filago pyramidata (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Filicium decipiens (Sapindaceae) | fern leaf tree, fern tree, soapberry | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Filipendula glaberrima (Rosaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Filipendula ulmaria (Rosaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Fimbristylis acuminata (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Fimbristylis aestivalis (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Fimbristylis autumnalis (Cyperaceae) | slender fimbristylis | NOT native to Hawaii | ?unresearched | ?unresearched |
| Fimbristylis cymosa (Cyperaceae) | button sedge, mauu akiaki | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Fimbristylis cymosa subsp. spathacea (Cyperaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Fimbristylis cymosa subsp. umbellato (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Fimbristylis cymosa subsp. umbellato-capitata (Cyperaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Fimbristylis dichotoma (Cyperaceae) | fimbristylis | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Fimbristylis ferruginea (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Fimbristylis globulosa (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Fimbristylis hawaiiensis (Cyperaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Fimbristylis hispidula (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Fimbristylis littoralis (Cyperaceae) | grass-like fimbristylis, lesser fimbristylis | NOT native to Hawaii | ?unresearched | ?unresearched |
| Fimbristylis miliacea (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Fimbristylis umbellaris (Cyperaceae) | globular fimbristylis | NOT native to Hawaii | ?unresearched | ?unresearched |
| Firmiana simplex (Sterculiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Fissidens aphelotaxifolius (Fissidentaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Fissidens baldwinii (Fissidentaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Fissidens bryoides (Fissidentaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Fissidens delicatulus (Fissidentaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Fissidens elegans (Fissidentaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Fissidens hoei (Fissidentaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Fissidens kilaueae (Fissidentaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Fissidens lancifolius (Fissidentaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Fissidens nothotaxifolius (Fissidentaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Fissidens pacificus (Fissidentaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Fissidens submarginatus (Fissidentaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Fissidens taxifolius (Fissidentaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Fittonia verschaffeltii (Acanthaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Flacourtia indica (Flacourtiaceae) | batoko plum, governor's plum, Indian plum, Madagascar plum, ramontchi | NOT native to Hawaii | ?unresearched | ?unresearched |
| Flacourtia jangomas (Flacourtiaceae) | Indian cherry, Indian plum, rukam, rukham, runeala plum | NOT native to Hawaii | ?unresearched | ?unresearched |
| Flacourtia montana (Flacourtiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Flacourtia rukam (Flacourtiaceae) | governor's plum, Indian plum, Indian prune, rukam | NOT native to Hawaii | ?unresearched | ?unresearched |
| Flaveria bidentis (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Flaveria trinervia (Asteraceae) | clustered yellowtops, flaveria | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Fleischmannia pratensis (Asteraceae) | purple malva | NOT native to Hawaii | ?unresearched | ?unresearched |
| Flemingia macrophylla (Fabaceae) | (no common names known by PIER) | NOT native to Hawaii | ?unresearched | ?unresearched |
| Flemingia strobilifera (Fabaceae) | luck plant, wild hops | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Fleurya interrupta (Urticaceae) | hen's nettle | NOT native to Hawaii | ?unresearched | ?unresearched |
| Flindersia brayleyana (Rutaceae) | Queensland maple, silkwood | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Florestina tripteris (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Floribundaria baldwinii (Meteoriaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Floribundaria floribunda (Meteoriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Flueggea flexulosa (Euphorbiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Flueggea neowawraea (Euphorbiaceae) | mehamehame | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Flueggea virosa (Euphorbiaceae) | Chinese waterberry | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Foeniculum vulgare (Apiaceae) | fennel, sweet fennel | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Foeniculum vulgare var. vulgare (Apiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Fortunella japonica (Rutaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Fortunella sp. (Rutaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Fragaria chiloensis (Rosaceae) | ohelo papa | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Fragaria chiloensis subsp. sandwicensis (Rosaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Fragaria vesca (Rosaceae) | European strawberry, sow-teat strawberry, woodland strawberry | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Fragaria vesca subsp. vesca (Rosaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Fragaria x ananassa (Rosaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Frangula alnus (Rhamnaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Frankenia pulverulenta (Frankeniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Fraxinus angustifolia (Oleaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Fraxinus angustifolia subsp. angustifolia (Oleaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Fraxinus angustifolia subsp. oxycarpa (Oleaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Fraxinus griffithii (Oleaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Fraxinus ornus (Oleaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Fraxinus pennsylvanica (Oleaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Fraxinus rotundifolia (Oleaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Fraxinus uhdei (Oleaceae) | Mexican ash, shamel ash, tropical ash | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Freesia alba x leichtlinii (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Freesia hybrid (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Freesia leichtlinii (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Freesia refracta (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Freesia spp. (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Freesia x sp. (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Freycinetia arborea (Pandanaceae) | ieie | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Freycinetia cumingiana (Pandanaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Fritillaria caucasica (Liliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Fritillaria imperialis (Liliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Froelichia gracilis (Amaranthaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Frullania apiculata (Frullaniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Frullania hawaiiensis (Frullaniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Frullania hypoleuca (Frullaniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Frullania intermedia (Frullaniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Frullania meyeniana (Frullaniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Frullania neurota (Frullaniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Frullania oahuensis (Frullaniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Frullania squarrosa (Frullaniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Fuchsia arborescens (Onagraceae) | fuchsia | NOT native to Hawaii | ?unresearched | ?unresearched |
| Fuchsia boliviana (Onagraceae) | earring flower, fuchsia, lady's eardrops | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Fuchsia hybrida (Onagraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Fuchsia magellanica (Onagraceae) | earring flower, hardy fuchsia, kulapepeiao | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Fuchsia paniculata (Onagraceae) | fuchsia, lady's eardrops | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Fuchsia spp. (Onagraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Fuirena ciliaria (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Fuirena ciliaris (Cyperaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Fuirena umbellata (Cyperaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Fumaria bastardii (Fumariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Fumaria capreolata (Fumariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Fumaria densiflora (Fumariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Fumaria indica (Fumariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Fumaria muralis (Fumariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Fumaria muralis subsp. muralis (Fumariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Fumaria officinalis (Fumariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Fumaria parviflora var. parviflora (Fumariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Funaria calvescens (Funariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Funaria hygrometrica (Funariaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Funaria subintegra (Funariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Funtumia elastica (Apocynaceae) | African rubber tree, bush rubber, Ive rubber, Lagos rubber, Lagos silk rubbertree, silkrubber, West African rubbertree | NOT native to Hawaii | ?unresearched | ?unresearched |
| Furcraea cabuya (Agavaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Furcraea cubensis (Agavaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Furcraea foetida (Agavaceae) | giant cabuya, green aloe, maguey, malina, Mauritian hemp, Mauritius hemp, sisal | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Furcraea gigantea (Agavaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Furcraea hexapetala (Agavaceae) | Cuban hemp, hemp | NOT native to Hawaii | ?unresearched | ?unresearched |
| Furcraea selloa (Agavaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Furcraea spp. (Agavaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gagnebina pterocarpa (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gahnia aspera subsp. globosa (Cyperaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Gahnia beecheyi (Cyperaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Gahnia gahniiformis (Cyperaceae) | gahnia | (unresearched) | ?unresearched | ?unresearched |
| Gahnia lanaiensis (Cyperaceae) | [no common name known] | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Gahnia vitiensis subsp. kauaiensis (Cyperaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Gaillardia pulchella (Asteraceae) | gaillardia, melekula wai kahuli, waikahuli | NOT native to Hawaii | ?unresearched | ?unresearched |
| Galactia tenuiflora (Fabaceae) | Florida hammock milkpea | NOT native to Hawaii | ?unresearched | ?unresearched |
| Galactites tomentosa (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Galanthus nivalis (Liliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Galaxaura marginata (Galaxauraceae) | (unresearched) | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Galaxaura rugosa (Galaxauraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Galega officinalis (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Galenia pubescens (Aizoaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Galenia pubescens var. pubescens (Aizoaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Galenia secunda (Aizoaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Galeobdolon luteum (Lamiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Galeopsis tetrahit (Lamiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Galinsoga ciliata (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Galinsoga parviflora (Asteraceae) | galinsoga, gallant soldier, small-flower galinsoga, yellow weed | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Galinsoga quadriradiata (Asteraceae) | hairy galinsoga, Peruvian daisy | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Galium aparine (Rubiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Galium canescens (Rubiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Galium divaricatum (Rubiaceae) | bedstraw | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Galium humifusum (Rubiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Galium mollugo (Rubiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Galium murale (Rubiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Galium palustre (Rubiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Galium parisiense (Rubiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Galium pedemontanum (Rubiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Galium tinctorium (Rubiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Galium tricornutum (Rubiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Galium verum (Rubiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Galphimia glauca (Malpighiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Galphimia gracilis (Malpighiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Gamochaeta americana (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gamochaeta calviceps (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gamochaeta falcata (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gamochaeta pensylvanica (Asteraceae) | Pennsylvania cudweed | NOT native to Hawaii | ?unresearched | ?unresearched |
| Gamochaeta purpurea (Asteraceae) | purple cudweed | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Ganonema farinosum (Liagoraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ganonema papenfussii (Liagoraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ganonema pinnatum (Liagoraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ganonema samaense (Liagoraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Garcinia mangostana (Clusiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Garcinia xanthochymus (Clusiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gardenia augusta (Rubiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Gardenia brighamii (Rubiaceae) | gardenia, nanu | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Gardenia gordonii (Rubiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gardenia latifolia (Rubiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gardenia mannii (Rubiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Gardenia remyi (Rubiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Gardenia sootepensis (Rubiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gardenia sp. (Rubiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Gardenia ternifolia subsp. jovis-tonantis (Rubiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Garnotia acutigluma (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Garnotia sandwicensis (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Garnotia stricta (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Garovaglia haleakalae (Pterobryaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Garovaglia powellii (Pterobryaceae) | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Garovaglia powellii var. haleakalae (Pterobryaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Gastridium phleoides (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gastridium ventricosum (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gaudinia fragilis (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gaultheria mucronata (Ericaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gaura lindheimeri (Onagraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Gaura mollis (Onagraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gayralia oxysperma (Gayraliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gazania linearis (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gazania rigens (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gazania rigens var. leucolaena (Asteraceae) | trailing gazania, treasure flower | NOT native to Hawaii | ?unresearched | ?unresearched |
| Gazania rigens var. rigens (Asteraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Gazania spp. (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gelidiella acerosa (Gelidiellaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gelidiopsis scoparia (Lomentariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gelidium pluma (Gelidiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gelidium pusillum (Gelidiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gelidium vagum (Gelidiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gelsemium sempervirens (Loganiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Geniostoma rupestre (Loganiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Genipa americana (Rubiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Genista canariensis (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Genista linifolia (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Genista monspessulana (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Genista monspessulanus (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Genista racemosa (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Genista spp. (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Genista tinctoria (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Geoffroea spinosa (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Geogenanthus sp. (Commelinaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Gephyria media (Entopylaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Geranium arboreum (Geraniaceae) | nohoanu | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Geranium carolinianum (Geraniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Geranium columbinum (Geraniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Geranium cuneatum (Geraniaceae) | nohoanu | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Geranium cuneatum subsp. cuneatum (Geraniaceae) | nohoanu | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Geranium cuneatum subsp. hololeucum (Geraniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Geranium cuneatum subsp. hypoleucum (Geraniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Geranium cuneatum subsp. tridens (Geraniaceae) | nohoanu | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Geranium dissectum (Geraniaceae) | cranesbill | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Geranium hanaense (Geraniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Geranium hillebrandii (Geraniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Geranium homeanum (Geraniaceae) | cranesbill | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Geranium kauaiense (Geraniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Geranium lucidum (Geraniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Geranium molle (Geraniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Geranium molle var. molle (Geraniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Geranium multiflorum (Geraniaceae) | nohoanu | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Geranium nepalense (Geraniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Geranium pusillum (Geraniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Geranium pyrenaicum (Geraniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Geranium retrorsum (Geraniaceae) | cransebill | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Geranium robertianum (Geraniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Geranium ruprechtii (Geraniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Geranium sanguineum (Geraniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Geranium thunbergii (Geraniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Geranium yeoi (Geraniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gibsmithia dotyi (Dumontiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gibsmithia hawaiiensis (Dumontiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gigantochloa sp. (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Gilia capitata (Polemoniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ginkgo biloba (Ginkgoaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Gironniera parviflora (Ulmaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gladiolus angustus (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gladiolus cardinalis (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gladiolus caryophyllaceus (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gladiolus communis (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gladiolus communis subsp. byzantinus (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gladiolus dalenii (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gladiolus delenii (Iridaceae) | gladiola | NOT native to Hawaii | ?unresearched | ?unresearched |
| Gladiolus sp. (Iridaceae) | gladiola | NOT native to Hawaii | ?unresearched | ?unresearched |
| Gladiolus spp. (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gladiolus tristis (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gladiolus undulatus (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Glaucium corniculatum (Papaveraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Glaucium flavum (Papaveraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Glechoma hederacea (Lamiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gleditsia triacanthos (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Glinus lotoides (Molluginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Glinus oppositifolia (Molluginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gliricidia sepium (Fabaceae) | gliricidia, madre de cacao, Mexican lilac, mother of cacao, Nicaraguan cocoashade, quickstick | NOT native to Hawaii | ?unresearched | ?unresearched |
| Globba atrosanguinea (Zingiberaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Globba winitii (Zingiberaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Gloeothece fuscolutea (Chroococcaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gloriosa rothschildiana (Liliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gloriosa superba (Liliaceae) | climbing lily, creeping lily, fire lily, flame lily, gloriosa lily, glory lily | NOT native to Hawaii | ?unresearched | ?unresearched |
| Glossadelphus acutifolius (Sematophyllaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Glossadelphus laevifolius (Sematophyllaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Glossadelphus limnobioides (Sematophyllaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Glossadelphus mauiensis (Sematophyllaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Glossadelphus ogatae (Sematophyllaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Glossadelphus torrentium (Sematophyllaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Glossostigma cleistanthum (Phrymaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Glossostigma diandrum (Phrymaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Glyceria canadensis (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Glyceria declinata (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Glyceria fluitans (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Glyceria grandis (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Glyceria maxima (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Glyceria notata (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Glyceria plicata (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Glyceria striata (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Glycine max (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Glycine tabacina (Fabaceae) | glycine, vanilla glycine | NOT native to Hawaii | ?unresearched | ?unresearched |
| Glycyrrhiza glabra (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gmelina arborea (Verbenaceae) | gmelina, Malay bush-beech, white beech, white teak | NOT native to Hawaii | ?unresearched | ?unresearched |
| Gmelina asiatica (Verbenaceae) | Asiatic beechberry, badhara bush, oval-leafed gmelina | NOT native to Hawaii | ?unresearched | ?unresearched |
| Gmelina elliptica (Verbenaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Gnaphalium collinum (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gnaphalium japonicum (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gnaphalium polycaulon (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gnaphalium purpureum (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gnaphalium sandwicensis (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gnaphalium sandwicensium (Asteraceae) | enaena, puheu | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Gnaphalium sandwicensium var. molokaiense (Asteraceae) | enaena, puheu | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Gnaphalium stramineum (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gnaphalium viravira (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gnetum gnemon (Gnetaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Goldfussia isophylla (Acanthaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gomphocarpus cancellatus (Asclepiadaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gomphocarpus fruticosus (Asclepiadaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gomphocarpus physocarpus (Asclepiadaceae) | balloon cottonbush, balloon plant, bladderbush, wild cotton | NOT native to Hawaii | ?unresearched | ?unresearched |
| Gomphrena celosioides (Amaranthaceae) | gomphrena weed | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Gomphrena globosa (Amaranthaceae) | bachelor's button, bozu, everlasting, globe amaranth, lehua, lehua mau loa, lehua moa loa, lehua pepa, leihua, pearly everlasting | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Gomphrena serrata (Amaranthaceae) | gamphrena | NOT native to Hawaii | ?unresearched | ?unresearched |
| Gonocarpus chinensis (Haloragaceae) | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Gonocormus minutus (Hymenophyllaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Gonocormus prolifer (Hymenophyllaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Goodenia koningsbergeri (Goodeniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gorteria personata (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gossypium barbadense (Malvaceae) | cotton, kī‘ailana, pulupulu, pulupulu haole, sea island cotton | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Gossypium hirsutum (Malvaceae) | upland cotton | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Gossypium tomentosum (Malvaceae) | Hawaiian cotton, mao | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Gouania hillebrandii (Rhamnaceae) | gouania | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Gouania meyenii (Rhamnaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Gouania polygama (Rhamnaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Gouania vitifolia (Rhamnaceae) | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Gracilaria coronopifolia (Gracilariaceae) | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Gracilaria dawsonii (Gracilariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gracilaria epihippisora (Gracilariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gracilaria eucheumatoides (Gracilariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gracilaria parvispora (Gracilariaceae) | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Gracilaria salicornia (Gracilariaceae) | gorilla ogo | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Gracilaria spp. (Gracilariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gracilaria tikvahiae (Gracilariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Grammatophyllum speciosum (Orchidaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Grammitis baldwinii (Grammitidaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Grammitis forbesiana (Grammitidaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Grammitis hookeri (Grammitidaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Grammitis tenella (Grammitidaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Graptopetalum paraguayense (Crassulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Graptophyllum pictum (Acanthaceae) | caricature plant | NOT native to Hawaii | ?unresearched | ?unresearched |
| Grateloupia doryophora (Halymeniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Grateloupia doryphora (Halymeniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Grateloupia filicina (Halymeniaceae) | (unresearched) | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Grateloupia filicina var. luxurians (Halymeniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Grateloupia hawaiiana (Halymeniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Grateloupia phuquocensis (Halymeniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Grevillea arenaria (Proteaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Grevillea banksii (Proteaceae) | Bank's grevillea, ha‘iku, kāhili, kahili flower, ‘oka pua ‘ula‘ula, red silky-oak, silky oak | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Grevillea floribunda subsp. floribunda (Proteaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Grevillea hybrid (Proteaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Grevillea juniperina (Proteaceae) | protea | NOT native to Hawaii | ?unresearched | ?unresearched |
| Grevillea leucopteris (Proteaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Grevillea robusta (Proteaceae) | ha‘iku ke‘oke‘o, he oak, she-oak, silk oak, silky oak, silver oak, spider flower | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Grevillea rosmarinifolia (Proteaceae) | grevillea | NOT native to Hawaii | ?unresearched | ?unresearched |
| Grevillea sp. cv. Ivanhoe (Proteaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Grevillea wilsonii (Proteaceae) | grevillea | NOT native to Hawaii | ?unresearched | ?unresearched |
| Grewia asiatica (Tiliaceae) | phalsa, phassa | NOT native to Hawaii | ?unresearched | ?unresearched |
| Grewia flavescens (Tiliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Grewia occidentalis (Tiliaceae) | four corners | NOT native to Hawaii | ?unresearched | ?unresearched |
| Griffithsia heteromorpha (Ceramiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Griffithsia subcylindrica (Ceramiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Grimmia anodon (Grimmiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Grimmia haleakalae (Grimmiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Grimmia laevigata (Grimmiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Grimmia longirostris (Grimmiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Grimmia mauiense (Grimmiaceae) | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Grimmia maunakeaense (Grimmiaceae) | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Grimmia pilifera (Grimmiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Grimmia pulvinata (Grimmiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Grimmia scabrifolia (Grimmiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Grimmia trichophylla (Grimmiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Guadua angustifolia (Poaceae) | guadua | NOT native to Hawaii | ?unresearched | ?unresearched |
| Guaiacum officinale (Zygophyllaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Guaiacum sanctum (Zygophyllaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Guazuma ulmifolia (Sterculiaceae) | bastard cedar, jacocalalu, West Indian elm | (unresearched) | ?unresearched | ?unresearched |
| Gunnera kauaiensis (Gunneraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Gunnera petaloidea (Gunneraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Gunnera tinctoria (Gunneraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gutierrezia sarothrae (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Guzmania lindenii (Bromeliaceae) | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Gymnocoronis spilanthoides (Asteraceae) | Senegal tea, temple plant | NOT native to Hawaii | ?unresearched | ?unresearched |
| Gymnothamnion elegans (Ceramiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gynandriris setifolia (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gynerium sagittatum (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gynura aurantiaca (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gypsophila paniculata (Caryophyllaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Gypsophila tubulosa (Caryophyllaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Haematoxylum campechianum (Fabaceae) | bloodwood tree, campeachy wood, campeche, campechewood, logwood | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hageniella micans (Sematophyllaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Hainardia cylindrica (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hakea costata (Proteaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hakea drupacea (Proteaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hakea elliptica (Proteaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hakea francisiana (Proteaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hakea gibbosa (Proteaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hakea laurina (Proteaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hakea pycnoneura (Proteaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hakea salicifolia (Proteaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hakea sericea (Proteaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hakea spp. (Proteaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hakea suaveolens (Proteaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Halichrysis coalescens (Rhodymeniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Halimeda discoidea (Halimedaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Halimeda kanaloana (Halimedaceae) | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Halimeda opuntia (Halimedaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Haliptilon subulatum (Corallinaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Halogeton glomeratus (Chenopodiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Halophila decipiens (Hydrocharitaceae) | (unresearched) | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Halophila hawaiiana (Hydrocharitaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Haloplegma duperreyi (Ceramiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Haloragis micrantha (Haloragaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Halymenia formosa (Halymeniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Halymenia stipitata (Halymeniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hamamelis sp. (Hamamelidaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hamelia patens (Rubiaceae) | Hamelia | NOT native to Hawaii | ?unresearched | ?unresearched |
| Hanguana malayana (Hanguanaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hapaline benthamiana (Araceae) | (unresearched) | ?unresearched | ?unresearched | |
| Haplocladium microphyllum (Leskeaceae) | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Haplohymenium triste (Thuidiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Haplopteris elongata (Vittariaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Haplostachys bryanii (Lamiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Haplostachys haplostachya (Lamiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Haplostachys linearifolia (Lamiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Haplostachys munroi (Lamiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Haplostachys truncata (Lamiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Harpephyllum caffrum (Anacardiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Harpullia pendula (Sapindaceae) | Australian tulipwood | NOT native to Hawaii | ?unresearched | ?unresearched |
| Harrisia martinii (Cactaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Harungana madagascariensis (Clusiaceae) | dragon's-blood tree, haronga, harungana | NOT native to Hawaii | ?unresearched | ?unresearched |
| Hawaiia minuscula (Rhodomelaceae) | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Hebe elliptica (Scrophulariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hebe speciosa (Scrophulariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hebe x franciscana (Scrophulariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hedera algeriensis (Araliaceae) | Algerian ivy | NOT native to Hawaii | ?unresearched | ?unresearched |
| Hedera canariensis (Araliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hedera helix (Araliaceae) | English ivy, ivy | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hedera helix var. helix (Araliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hedera pastuchovii (Araliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hedera spp. (Araliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hedychium coccineum (Zingiberaceae) | red ginger-lily, scarlet ginger-lily | NOT native to Hawaii | ?unresearched | ?unresearched |
| Hedychium coronarium (Zingiberaceae) | ‘awapuhi ke‘oke‘o, butterfly lily, common ginger lily, garland flower, ginger lily, red ginger-lily, scarlet ginger-lily, white ginger | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hedychium coronarium x gardnerianum (Zingiberaceae) | white x kahili hybrid ginger | NOT native to Hawaii | ?unresearched | ?unresearched |
| Hedychium flavescens (Zingiberaceae) | ‘awapuhi melemele, cream ginger, yellow ginger | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hedychium gardnerianum (Zingiberaceae) | ‘awapuhi kahili, kāhili, kāhili ginger, kahili ginger, yellow ginger | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hedychium sp. (Zingiberaceae) | ginger | NOT native to Hawaii | ?unresearched | ?unresearched |
| Hedyotis acuminata (Rubiaceae) | au, pilo | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hedyotis callitrichoides (Rubiaceae) | hedyotis | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hedyotis centranthoides (Rubiaceae) | hedyotis | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hedyotis cookiana (Rubiaceae) | awiwi | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hedyotis coriacea (Rubiaceae) | kio'ele, kioele | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hedyotis corymbosa (Rubiaceae) | hedyotis | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hedyotis degeneri (Rubiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hedyotis degeneri var. coprosmifolia (Rubiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Hedyotis degeneri var. degeneri (Rubiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Hedyotis diffusa (Rubiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hedyotis elatior (Rubiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Hedyotis fluviatilis (Rubiaceae) | kamapuaa | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Hedyotis flynnii (Rubiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Hedyotis foggiana (Rubiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Hedyotis foliosa (Rubiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Hedyotis formosa (Rubiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Hedyotis fosbergii (Rubiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Hedyotis haupuensis (Rubiaceae) | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Hedyotis hillebrandii (Rubiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Hedyotis knudsenii (Rubiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Hedyotis littoralis (Rubiaceae) | hedyotis | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Hedyotis mannii (Rubiaceae) | pilo | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hedyotis parvula (Rubiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Hedyotis schlechtendahliana subsp. remyi (Rubiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Hedyotis schlechtendahliana subsp. schlechtendahliana (Rubiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Hedyotis schlechtendahliana subsp. waimeae (Rubiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Hedyotis schlechtendahliana var. remyi (Rubiaceae) | [no common name known] | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hedyotis sp. nov. (Rubiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hedyotis st.-johnii (Rubiaceae) | [no common name known] | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hedyotis terminalis (Rubiaceae) | manono | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hedyotis tryblium (Rubiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Hedypnois cretica (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hedypnois rhagadioloides (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Helianthus annuus (Asteraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Helianthus argophyllus (Asteraceae) | silverleaf sunflower | NOT native to Hawaii | ?unresearched | ?unresearched |
| Helianthus ciliaris (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Helianthus debilis (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Helianthus petiolaris (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Helianthus tuberosus (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Helichrysum foetidum (Asteraceae) | stinking everlasting | (unresearched) | ?unresearched | ?unresearched |
| Helichrysum petiolare (Asteraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Helichrysum petiolatum (Asteraceae) | licorice plant | (unresearched) | ?unresearched | ?unresearched |
| Heliconia bihai (Heliconiaceae) | lobster claw | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Heliconia brasilensis (Heliconiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Heliconia caribaea (Heliconiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Heliconia chartacea (Heliconiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Heliconia episcopalis (Heliconiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Heliconia humilis (Heliconiaceae) | lobster claw | NOT native to Hawaii | ?unresearched | ?unresearched |
| Heliconia latispatha (Heliconiaceae) | golden lobster claw | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Heliconia lingulata (Heliconiaceae) | heliconia | NOT native to Hawaii | ?unresearched | ?unresearched |
| Heliconia mariae (Heliconiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Heliconia metallica (Heliconiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Heliconia orthotricha (Heliconiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Heliconia pendula (Heliconiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Heliconia psittacorum (Heliconiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Heliconia sp. (Heliconiaceae) | heliconia | NOT native to Hawaii | ?unresearched | ?unresearched |
| Heliconia spp. (Heliconiaceae) | crab claw, heliconia, lobster claw, parrot's-flower, parrot's-plantain | NOT native to Hawaii | ?unresearched | ?unresearched |
| Heliconia standleyi (Heliconiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Heliconia steyermarkii (Heliconiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Heliconia stricta (Heliconiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Heliconia wagneriana (Heliconiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Heliocarpus popayanensis (Tiliaceae) | broadleaf moho, high ridge moho, moho, mountain moho, white moho | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Heliophila pusilla (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Heliotropium amplexicaule (Boraginaceae) | heliotrope | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Heliotropium anomalum (Boraginaceae) | Polynesian heliotrope | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Heliotropium anomalum var. argenteum (Boraginaceae) | hinahina, hinahina ku kahakai, nohonohopuuone, pohinahina | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Heliotropium arborescens (Boraginaceae) | heliotrope | NOT native to Hawaii | ?unresearched | ?unresearched |
| Heliotropium curassavicum (Boraginaceae) | kipukai, lau poopoohina, nena, seaside heliotrope | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Heliotropium europaeum (Boraginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Heliotropium indicum (Boraginaceae) | Indian heliotrope, turnsole | NOT native to Hawaii | ?unresearched | ?unresearched |
| Heliotropium ovalifolium (Boraginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Heliotropium procumbens (Boraginaceae) | four-spike heliotrope, heliotrope, prostrate heliotrope, slender heliotrope | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Heliotropium supinum (Boraginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Helminthotheca echioides (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hemarthria altissima (Poaceae) | hemarthria | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hemarthria compressa (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hemerocallis fulva (Liliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hemerocallis lilioasphodelus (Liliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hemerocallis sp. (Liliaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Hemigraphis alternata (Acanthaceae) | cemetery plant, metal leaf, metal-leaf, metallic plant, purple waffle plant, red flame ivy, red ivy, red-flame, red-flame ivy | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hemigraphis reptans (Acanthaceae) | red lily, waffle plant | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hemizonia pungens (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Heracleum mantegazzianum (Apiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Herbertus hawaiiensis (Herbertaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Heritiera littoralis (Sterculiaceae) | dungun, looking glass tree, looking-glass tree | NOT native to Hawaii | ?unresearched | ?unresearched |
| Hernandia nukuhivensis (Hernandiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hernandia nymphaeifolia (Hernandiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Herniaria cinerea (Caryophyllaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Herniaria hirsuta (Caryophyllaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Herposiphonia pacifica (Rhodomelaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Herposiphonia parca (Rhodomelaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Herposiphonia secunda (Rhodomelaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hesperantha falcata (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hesperis matronalis (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hesperocnide sandwicensis (Urticaceae) | hesperocnide | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Hesperocnide tenella (Urticaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hesperomannia arborescens (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Hesperomannia arbuscula (Asteraceae) | [no common name known] | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hesperomannia lydgatei (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Heteranthera dubia (Pontederiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Heteranthera limosa (Pontederiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Heteranthera reniformis (Pontederiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Heterocentron elegans (Melastomataceae) | Spanish shawl | (unresearched) | ?unresearched | ?unresearched |
| Heterocentron subtriplinervium (Melastomataceae) | pearl flower | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Heterodon nasicus (Bruniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Heteromeles arbutifolia (Rosaceae) | heteromeles | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Heterophyllium subauriculatum (Sematophyllaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Heteropogon contortus (Poaceae) | pili | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Heteroscyphus argutus (Lophocoleaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Heterospathe elata (Arecaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Heterotheca grandiflora (Asteraceae) | telegraph weed | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Heterotheca subaxillaris (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hevea brasiliensis (Euphorbiaceae) | Brazilian rubber tree, hevea, Para rubber tree | NOT native to Hawaii | ?unresearched | ?unresearched |
| Hexaglottis lewisiae (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hibbertia cuneiformis (Dilleniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hibiscadelphus bombycinus (Malvaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Hibiscadelphus crucibracteatus (Malvaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Hibiscadelphus distans (Malvaceae) | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Hibiscadelphus giffardianus (Malvaceae) | hau kuahiwi | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hibiscadelphus hualalaiensis (Malvaceae) | [no common name known] | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hibiscadelphus wilderianus (Malvaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Hibiscadelphus woodii (Malvaceae) | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Hibiscus acetosella (Malvaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Hibiscus arnottianus (Malvaceae) | hau hele, Hawaiian white hibiscus, koki'o kea, koki'o ke'oke'o, Oahu white hibiscus, pamakani | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hibiscus arnottianus subsp. arnottianus (Malvaceae) | hau hele, kokio kea, kokio keokeo, pamakani | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hibiscus arnottianus subsp. immaculatus (Malvaceae) | hau hele, hau kuahiwi, kokio kea, kokio keokeo, pamakani | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hibiscus arnottianus subsp. punaluuensis (Malvaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Hibiscus brackenridgei (Malvaceae) | mao hau hele | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hibiscus brackenridgei subsp. brackenridgei (Malvaceae) | mao hau hele | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hibiscus brackenridgei subsp. mokuleianus (Malvaceae) | ma'o hau hele | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hibiscus brackenridgei subsp. molokaiana (Malvaceae) | ma'o hau hele | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hibiscus brackenridgei subsp. molokaianus (Malvaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Hibiscus calyphyllus (Malvaceae) | Rock's hibiscus | (unresearched) | ?unresearched | ?unresearched |
| Hibiscus clayi (Malvaceae) | Hawaiian red hibiscus, hibiscus | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hibiscus diversifolius (Malvaceae) | swamp hibiscus | NOT native to Hawaii | ?unresearched | ?unresearched |
| Hibiscus furcellatus (Malvaceae) | akiahala, akiohala, hau hele, hau hele wai, Hawaiian pink hibiscus | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hibiscus genevii (Malvaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hibiscus kokio (Malvaceae) | Hawaiian red hibiscus, kokio, kokio ula, kokio ulaula, maku | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hibiscus kokio subsp. kokio (Malvaceae) | Hawaiian red hibiscus, kokio, kokio ula, kokio ulaula, maku | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Hibiscus kokio subsp. saintjohnianus (Malvaceae) | Hawaiian orange hibiscus, kokio, kokio ula, kokio ulaula, maku | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Hibiscus makinoi (Malvaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hibiscus moscheutos (Malvaceae) | swamp rose mallow | NOT native to Hawaii | ?unresearched | ?unresearched |
| Hibiscus mutabilis (Malvaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Hibiscus rosa-sinensis (Malvaceae) | hibiscus | NOT native to Hawaii | ?unresearched | ?unresearched |
| Hibiscus sabdariffa (Malvaceae) | Indian sorrel, Jamaica sorrel, Jamaican sorrel, red sorrel, rosella, roselle, sorrel | NOT native to Hawaii | ?unresearched | ?unresearched |
| Hibiscus schizopetalus (Malvaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Hibiscus syriacus (Malvaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hibiscus tiliaceus (Malvaceae) | hau | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hibiscus trionum (Malvaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hibiscus trionum var. trionum (Malvaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hibiscus waimeae (Malvaceae) | Hawaiian white hibiscus, kokio kea, kokio keokeo | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hibiscus waimeae subsp. hannerae (Malvaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Hibiscus waimeae subsp. waimeae (Malvaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Hicoria alba (Juglandaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hicoria aquatica (Juglandaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hicoria floridana (Juglandaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hicoria glabra (Juglandaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hieracium aurantiacum (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hieracium caespitosum (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hieracium canadense (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hieracium kalmii (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hieracium lachenalii (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hieracium lepidulum (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hieracium pilosella (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hieracium piloselloides (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hieracium praealtum (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hieracium pratense (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hieracium sp. (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hieracium spp. (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hieracium umbellatum (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hieracium x floribundum (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hieracium x sp. (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hillebrandia sandwicensis (Begoniaceae) | akaakaawa, pua maka nui | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Hincksia indica (Ectocarpaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hippeastrum puniceum (Liliaceae) | amaryllis, Barbados lily, Easter lily | (unresearched) | ?unresearched | ?unresearched |
| Hippeastrum reginae (Liliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hippeastrum sp. (Liliaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Hippeastrum striatum (Liliaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Hippobroma longiflora (Campanulaceae) | madamfate, pua hōkū, star of Bethlehem | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hippophae rhamnoides (Elaeagnaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hippuris vulgaris (Plantaginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hiptage benghalensis (Malpighiaceae) | hiptage | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hiptage spp. (Malpighiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hirschfeldia incana (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Histiopteris incisa (Hypolepidaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hoffmannia ghiesbreghtii (Rubiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hohenbergia stellata (Bromeliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Holcus halepensis (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Holcus lanata (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Holcus lanatus (Poaceae) | common velvet grass, creeping soft grass, soft meadow grass, velvet grass, woolly soft grass, Yorkshire fog | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Holcus mollis (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Holcus setiger (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Holcus setosus (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Holcus sorghum (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Holcus sp. (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Holmskioldia sanguinea (Verbenaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Holomitrium brevicalycinum (Dicranaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Holomitrium seticalycinum (Dicranaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Holomitrium squarrifolium (Dicranaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Homalanthus novo-guineensis (Euphorbiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Homalanthus populifolius (Euphorbiaceae) | bleeding-heart, native bleeding-heart, Queensland poplar | NOT native to Hawaii | ?unresearched | ?unresearched |
| Homaliodendron dendroides (Neckeraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Homaliodendron flabellatum (Neckeraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Homalocladium platycladum (Polygonaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Homalomena sp. (Araceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Homeria collina (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Homeria flaccida (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Homeria miniata (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Homeria ochroleuca (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Homoglossum watsonium (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hookeria acutifolia (Hookeriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Hookeriopsis purpurea var. acuminatula (Hookeriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Hookeriopsis purpurea var. ligulacaea (Hookeriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Hookeriopsis purpurea var. purpurea (Hookeriaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Hordeum distichon (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hordeum geniculatum (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hordeum glaucum (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hordeum jubatum (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hordeum leporinum (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hordeum marinum (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hordeum murinum (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hordeum murinum subsp. glaucum (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hordeum murinum subsp. leporinum (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hordeum spp. (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hordeum vulgare (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hordeum vulgare subsp. distichon (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hordeum vulgare subsp. vulgare (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hormothamnion enteromorphioides (Rivulariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hornungia procumbens (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Houttuynia cordata (Saururaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hovenia dulcis (Rhamnaceae) | Chinese raisintree, Japanese raisintree | NOT native to Hawaii | ?unresearched | ?unresearched |
| Howea forsteriana (Arecaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Hoya australis (Asclepiadaceae) | wax flower | NOT native to Hawaii | ?unresearched | ?unresearched |
| Hoya multiflora (Asclepiadaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Hoya sp. (Asclepiadaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Humulus japonicus (Cannabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Humulus lupulus (Cannabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hunnemannia fumariifolia (Papaveraceae) | Mexican tulip poppy | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Huperzia erosa (Lycopodiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Huperzia erubescens (Lycopodiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Huperzia filiformis (Lycopodiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Huperzia haleakalae (Lycopodiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Huperzia mannii (Lycopodiaceae) | wawae'iole | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Huperzia nutans (Lycopodiaceae) | wawae'iole | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Huperzia phyllantha (Lycopodiaceae) | huperzia | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Huperzia serrata (Lycopodiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Huperzia sp. (Lycopodiaceae) | huperzia | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Huperzia stemmermanniae (Lycopodiaceae) | wawae'iole | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Huperzia subintegra (Lycopodiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Huperzia x carlquistii (Lycopodiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Huperzia x gillettii (Lycopodiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Huperzia x koolauensis (Lycopodiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Huperzia x medeirosii (Lycopodiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Huperzia x sulcinervia (Lycopodiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Huperzia x_carlquistii (Lycopodiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Huperzia x_gillettii (Lycopodiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Huperzia x_koolauensis (Lycopodiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Huperzia x_medeirosii (Lycopodiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Huperzia x_sulcinervia (Lycopodiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Hura crepitans (Euphorbiaceae) | sandbox tree | NOT native to Hawaii | ?unresearched | ?unresearched |
| Hyacinthoides hispanica (Hyacinthaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hyacinthoides non-scripta (Hyacinthaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hybanthus attenuatus (Violaceae) | greenviolet | NOT native to Hawaii | ?unresearched | ?unresearched |
| Hydrangea macrophylla (Hydrangeaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hydrangea paniculata (Hydrangeaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Hydrilla verticillata (Hydrocharitaceae) | Florida elodea, hydrilla, Indian stargrass, water thyme, water weed | NOT native to Hawaii | ?unresearched | ?unresearched |
| Hydrocera triflora (Balsaminaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hydrocharis dubia (Hydrocharitaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hydrocharis morsus-ranae (Hydrocharitaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hydroclathrus clathratus (Scytosiphonaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hydroclathrus tumulis (Scytosiphonaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hydrocleys nymphoides (Limnocharitaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hydrocotyle bonariensis (Apiaceae) | kurnell curse, large-leaved pennywort, pennywort | NOT native to Hawaii | ?unresearched | ?unresearched |
| Hydrocotyle bowlesioides (Apiaceae) | marsh pennywort | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hydrocotyle ranunculoides (Apiaceae) | water pennywort | NOT native to Hawaii | ?unresearched | ?unresearched |
| Hydrocotyle verticillata (Apiaceae) | laukahi, marsh pennywor, pohe, pohepohe | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hydrodictyon reticulatum (Hydrodictyaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hydrolea zeylanica (Hydrophyllaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Hydrolithon farinosum (Corallinaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hydrolithon gardineri (Corallinaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hydrolithon onkodes (Corallinaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hydrolithon reinboldii (Corallinaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hygrophila costata (Acanthaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hygrophila difformis (Acanthaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hygrophila erecta (Acanthaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hygrophila polysperma (Acanthaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hylocereus costaricensis (Cactaceae) | Costa Rica nightblooming cactus | (unresearched) | ?unresearched | ?unresearched |
| Hylocereus polyrhizus (Cactaceae) | pitahaya | NOT native to Hawaii | ?unresearched | ?unresearched |
| Hylocereus undatus (Cactaceae) | belle of the night, dragon fruit, night-blooming cereus, paniniokapunahoa, pāniniokapunahou, pāpipi pua, papipi pua, pitahaya, queen of the night, red pitaya, strawberry pear | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hymenachne acutigluma (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hymenachne amplexicaulis (Poaceae) | hymenachne, olive hymenachne, trompetilla, West Indian marsh grass | NOT native to Hawaii | ?unresearched | ?unresearched |
| Hymenachne amplexicaulis cv. Olive (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hymenachne pseudointerrupta (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hymenocallis caribaea (Liliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hymenocallis sp. (Liliaceae) | spider lily | NOT native to Hawaii | ?unresearched | ?unresearched |
| Hymenolobus procumbens (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hymenophyllum lanceolatum (Hymenophyllaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hymenophyllum obtusum (Hymenophyllaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hymenophyllum recurvum (Hymenophyllaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hymenostylium recurvirostrum (Pottiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hymenostylium recurvirostrum var. cylindricum (Pottiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Hymenostylium recurvirostrum var. recurvirostrum (Pottiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Hyophila involuta (Pottiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Hyophorbe lagenicaulis (Arecaceae) | bottle palm | NOT native to Hawaii | ?unresearched | ?unresearched |
| Hyoscyamus niger (Solanaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hyparrhenia dregeana (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Hyparrhenia hirta (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hyparrhenia rufa (Poaceae) | giant thatching grass, jaragua grass, thatch grass, thatching grass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hyparrhenia rufa subsp. altissima (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hyparrhenia rufa subsp. rufa (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hyparrhenia sp. (Poaceae) | thatching grass | NOT native to Hawaii | ?unresearched | ?unresearched |
| Hypecoum pendulum (Fumariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hyperaspis delicata (Lamiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hypericum androsaemum (Clusiaceae) | amber, sweet amber, tutsan | NOT native to Hawaii | ?unresearched | ?unresearched |
| Hypericum calycinum (Clusiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hypericum canariense (Clusiaceae) | Canary Island's St. John's wort, Canary Islands St. Johnswort | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hypericum elodes (Clusiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hypericum grandifolium (Clusiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hypericum humifusum (Clusiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hypericum japonicum (Clusiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hypericum mutilum (Clusiaceae) | St. John's wort | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hypericum mutilum subsp. mutilum (Clusiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hypericum perforatum (Clusiaceae) | goatweed, Klamath weed, St. John's wort, St. John's-wort | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hypericum perforatum var. angustifolium (Clusiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hypericum tetrapterum (Clusiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hypericum triquetrifolium (Clusiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hypericum x inodorum (Clusiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hypnea cervicornis (Hypneaceae) | (unresearched) | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Hypnea chordacea (Hypneaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hypnea musciformis (Hypneaceae) | hookweed | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hypnea saidana (Hypneaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hypneocolax stellaris (Hypneaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hypochaeris glabra (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hypochaeris radicata (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hypochaeris spp. (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hypochoeris glabra (Asteraceae) | smooth cat's ear | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hypochoeris radicata (Asteraceae) | flatweed, gosmore, hairy cat's ear | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hypoestes phyllostachya (Acanthaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Hypolepis dicksonioides (Dennstaedtiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hypolepis hawaiiensis var. hawaiiensis (Dennstaedtiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Hypolepis hawaiiensis var. mauiensis (Dennstaedtiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Hypolepis rugosula (Dennstaedtiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Hypopterygium sandwicense (Hypopterygiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Hyptis brevipes (Lamiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Hyptis capitata (Lamiaceae) | knobweed | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hyptis mutabilis (Lamiaceae) | tropical bushmint | NOT native to Hawaii | ?unresearched | ?unresearched |
| Hyptis pectinata (Lamiaceae) | comb bushmint, comb hyptis, mint weed, purple top, wild mint | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Hyptis rhomboidea (Lamiaceae) | capitate bushmint, knobweed | NOT native to Hawaii | ?unresearched | ?unresearched |
| Hyptis sidifolia (Lamiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Hyptis suaveolens (Lamiaceae) | chan, horehound, pignut, stinking Roger, wild spikenard | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Iberis umbellata (Brassicaceae) | globe candytuft | NOT native to Hawaii | ?unresearched | ?unresearched |
| Ibicella lutea (Martyniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ichnanthus nemorosus (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ilex anomala (Aquifoliaceae) | aiea, kawau | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Ilex aquifolium (Aquifoliaceae) | English holly, European holly | NOT native to Hawaii | ?unresearched | ?unresearched |
| Ilex cassine (Aquifoliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ilex crenata (Aquifoliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ilex guayusa (Aquifoliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ilex paraguariensis (Aquifoliaceae) | Brazilian tea, mate, Paraguay tea, Paraguayan tea, yerba mate | (unresearched) | ?unresearched | ?unresearched |
| Ilex sp. (Aquifoliaceae) | holly | NOT native to Hawaii | ?unresearched | ?unresearched |
| Ilex spp. (Aquifoliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Illecebrum verticillatum (Caryophyllaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Impatiens balfourii (Balsaminaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Impatiens balsamina (Balsaminaceae) | balsam, garden balsam, impatiens, rose balsam, spotted snapweed, touch-me-not | NOT native to Hawaii | ?unresearched | ?unresearched |
| Impatiens ecalcarata (Balsaminaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Impatiens glandulifera (Balsaminaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Impatiens grandulifera (Balsaminaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Impatiens hawkeri (Balsaminaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Impatiens noli-tangere (Balsaminaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Impatiens parviflora (Balsaminaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Impatiens sodenii (Balsaminaceae) | impatiens | NOT native to Hawaii | ?unresearched | ?unresearched |
| Impatiens spp. (Balsaminaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Impatiens sultani (Balsaminaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Impatiens wallerana (Balsaminaceae) | busy Lizzy, impatiens, patient Lucy | NOT native to Hawaii | ?unresearched | ?unresearched |
| Impatiens walleriana (Balsaminaceae) | balsam, bizzy-lizzie, busy lizzy, garden impatiens, Japanese balsam, patience plant, patient lucy, snapweed, sultan's balsam, sultan's flower, sultana, zanzibar balsam | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Imperata conferta (Poaceae) | plume grass | NOT native to Hawaii | ?unresearched | ?unresearched |
| Imperata cylindrica (Poaceae) | alang-alang, blady grass, cogon grass, imperata, Japanese blood grass | NOT native to Hawaii | ?unresearched | ?unresearched |
| Imperata cylindrica var. major (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Imperata spp. (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Indigofera decora (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Indigofera hirsuta (Fabaceae) | hairy indigo, hirsute indigo, rough hairy indigo | NOT native to Hawaii | ?unresearched | ?unresearched |
| Indigofera linifolia (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Indigofera oblongifolia (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Indigofera spicata (Fabaceae) | creeping indigo | NOT native to Hawaii | ?unresearched | ?unresearched |
| Indigofera suffruticosa (Fabaceae) | anil, anil indigo, indigo, ‘inikō, inikoa, kolū | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Indigofera tinctoria (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Inga edulis (Fabaceae) | ice cream bean | NOT native to Hawaii | ?unresearched | ?unresearched |
| Inga sapindoides (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Inga sp. (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Inga spectabilis (Fabaceae) | silky inga | NOT native to Hawaii | ?unresearched | ?unresearched |
| Inga striata (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Instia bijuga (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Inula helenium (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Iochroma cyanea (Solanaceae) | iochroma | NOT native to Hawaii | ?unresearched | ?unresearched |
| Ipheion uniflorum (Liliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ipomoea acuminata (Convolvulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ipomoea alba (Convolvulaceae) | koali pehu, moon flower, moonflower, morning glory | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Ipomoea aquatica (Convolvulaceae) | aquatic morning glory, Chinese water spinach, kang kong, morning glory, swamp cabbage, swamp morningglory, ung ts'oi, ung-choi, water convolvulus, water spinach | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Ipomoea batatas (Convolvulaceae) | sweet potato, ‘uala, ‘wala | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Ipomoea cairica (Convolvulaceae) | Cairo morning glory, coastal morning glory, ivy-leaved morning glory, koali, koali ‘ai, koali ‘ai‘ai, koali lau manamana, kowali, morning glory, pa‘ali‘i, railroad creeper | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Ipomoea carnea (Convolvulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ipomoea carnea subsp. fistulosa (Convolvulaceae) | bush morning glory | NOT native to Hawaii | ?unresearched | ?unresearched |
| Ipomoea coccinea (Convolvulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ipomoea fistulosa (Convolvulaceae) | morning glory | (unresearched) | ?unresearched | ?unresearched |
| Ipomoea hederacea (Convolvulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ipomoea hederifolia (Convolvulaceae) | ivy-leaf morning glory, star ipomoea, trompillo | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Ipomoea horsfalliae (Convolvulaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Ipomoea imperati (Convolvulaceae) | hunakai | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Ipomoea indica (Convolvulaceae) | koaliawa | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Ipomoea lacunosa (Convolvulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ipomoea littoralis (Convolvulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ipomoea lobata (Convolvulaceae) | firecracker vine, Spanish flag | (unresearched) | ?unresearched | ?unresearched |
| Ipomoea nil (Convolvulaceae) | blue morning glory | NOT native to Hawaii | ?unresearched | ?unresearched |
| Ipomoea obscura (Convolvulaceae) | ipomoea, obscure morningglory, small white morningglory | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Ipomoea ochracea (Convolvulaceae) | fence morningglory, ipomoea | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Ipomoea pes-caprae (Convolvulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ipomoea pes-caprae subsp. brasiliensis (Convolvulaceae) | pohuehue | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Ipomoea pes-tigridis (Convolvulaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Ipomoea pulchella (Convolvulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ipomoea purpurea (Convolvulaceae) | common morning-glory, tall morning-glory | NOT native to Hawaii | ?unresearched | ?unresearched |
| Ipomoea quamoclit (Convolvulaceae) | cardinal climber, Cupid's flower, cypress vine, cypressvine morning-glory, star of Bethlehem, star-glory, sweet-willy | NOT native to Hawaii | ?unresearched | ?unresearched |
| Ipomoea sagittata (Convolvulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ipomoea spp. (Convolvulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ipomoea trichocarpa (Convolvulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ipomoea tricolor (Convolvulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ipomoea triloba (Convolvulaceae) | Aiea morning-glory, little bell | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Ipomoea tuboides (Convolvulaceae) | hunakai | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Ipomoea violacea (Convolvulaceae) | beach moonflower, Hawaiian moonflower, moonflower, ololiuqui, sea moonflower, white morning-glory, wild moon flower | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Iris caucasica (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Iris foetidissima (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Iris laevigata (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Iris missouriensis (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Iris orientalis (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Iris pseudacorus (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Iris psuedacorus (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Iris sp. (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Iris spuria (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Iris x germanica (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Iris xiphium (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Isachne distichophylla (Poaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Isachne globosa (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Isachne pallens (Poaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Isachne pulchella (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Isatis tinctoria (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ischaemum byrone (Poaceae) | ischaemum | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Ischaemum indicum (Poaceae) | Indian murainagrass, smut grass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Ischaemum polystachyum (Poaceae) | paddle grass | NOT native to Hawaii | ?unresearched | ?unresearched |
| Ischaemum rugosum (Poaceae) | muraina grass, muraino grass, ribbed muraina grass, saramatta grass, wrinkle duck-beak, wrinkled grass | NOT native to Hawaii | ?unresearched | ?unresearched |
| Ischaemum timorense (Poaceae) | centipede grass, lacuntu grass, lucuntu grass, stalkleaf murainagrass, waidoi grass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Isodendrion hosakae (Violaceae) | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Isodendrion laurifolium (Violaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Isodendrion longifolium (Violaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Isodendrion pyrifolium (Violaceae) | wahine noho kula | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Isoetes hawaiiensis (Isoetaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Isolepis hystrix (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Isolepis marginata (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Isolepis nodosa (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Isolepis prolifera (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Isolepis sepulcralis (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Isoplexis canariensis (Plantaginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Isopogon formosus (Proteaceae) | rose cone flower | NOT native to Hawaii | ?unresearched | ?unresearched |
| Isopterygium albescens (Hypnaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Isopterygium vineale (Hypnaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Isoëtes hawaiiensis (Isoetaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Iva axillaris subsp. robustior (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ixia flexuosa (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ixia longituba (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ixia maculata (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ixia maculata x polystachya (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ixia paniculata (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ixia polystachya (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ixia viridiflora (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ixophorus unisetus (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ixora casei (Rubiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ixora coccinea (Rubiaceae) | flame of the forest, flame of the woods, jungle geranium, red ixora, scarlet ixora, scarlet jungleflame | NOT native to Hawaii | ?unresearched | ?unresearched |
| Ixora fulgens (Rubiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ixora hookeri (Rubiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ixora sp. (Rubiaceae) | ixora | NOT native to Hawaii | ?unresearched | ?unresearched |
| Izziella orientalis (Liagoraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Jacaranda mimosifolia (Bignoniaceae) | Brazilian rose wood, green ebony, jacaranda | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Jacobinia carnea (Acanthaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Jacquemontia ovalifolia (Convolvulaceae) | pau o Hiiaka | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Jacquemontia ovalifolia subsp. sandwicensis (Convolvulaceae) | pau o Hiiaka | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Jacquemontia tamnifolia (Convolvulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Jamesoniella robusta (Jungermanniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Jania micrarthrodia (Corallinaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Jania pumila (Corallinaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Jarava plumosa (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Jasminum dichotomum (Oleaceae) | Gold Coast jasmine | (unresearched) | ?unresearched | ?unresearched |
| Jasminum fluminense (Oleaceae) | Brazilian jasmine, jasmine | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Jasminum grandiflorum (Oleaceae) | Spanish jasmine | NOT native to Hawaii | ?unresearched | ?unresearched |
| Jasminum humile (Oleaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Jasminum mesnyi (Oleaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Jasminum multiflorum (Oleaceae) | downy jasmine | NOT native to Hawaii | ?unresearched | ?unresearched |
| Jasminum multipartitum (Oleaceae) | starry jasmine | NOT native to Hawaii | ?unresearched | ?unresearched |
| Jasminum nitidum (Oleaceae) | shining jasmine | NOT native to Hawaii | ?unresearched | ?unresearched |
| Jasminum polyanthum (Oleaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Jasminum sambac (Oleaceae) | Arabian jasmine, Indian jasmine, jasmine, pīkake, pikake | NOT native to Hawaii | ?unresearched | ?unresearched |
| Jasminum sp. (Oleaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Jatropha curcas (Euphorbiaceae) | Barbados nut, bubble bush, kuikui Pākē, kuku‘ihi, physic nut, purging nut | NOT native to Hawaii | PRESENT in Hawaii | ?unresearched |
| Jatropha gossypifolia (Euphorbiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Jatropha gossypiifolia (Euphorbiaceae) | bellyache bush, black physicnut, cotton-leaved physic nut | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Jatropha integerrima (Euphorbiaceae) | peregrina | NOT native to Hawaii | ?unresearched | ?unresearched |
| Jatropha podagrica (Euphorbiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Joinvillea ascendens (Joinvilleaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Joinvillea ascendens subsp. ascendens (Joinvilleaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Joinvillea ascendens subsp. glabra (Joinvilleaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Jubula hutschinsiae subsp. javanica (Jubulaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Juglans ailantifolia (Juglandaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Juglans neotropica (Juglandaceae) | Andean walnut, Ecuador walnut | NOT native to Hawaii | ?unresearched | ?unresearched |
| Juglans regia (Juglandaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Juglans x sp. (Juglandaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Juncellus alopecuroides (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Juncellus laevigatus (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Juncellus serotinus (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Juncus acuminatus (Juncaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Juncus acutiflorus (Juncaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Juncus acutus (Juncaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Juncus acutus subsp. acutus (Juncaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Juncus alatus (Juncaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Juncus articulatus (Juncaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Juncus buffonius (Juncaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Juncus bufonius (Juncaceae) | toad rush | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Juncus bulbosus (Juncaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Juncus canadensis (Juncaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Juncus capillaceus (Juncaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Juncus capitatus (Juncaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Juncus compressus (Juncaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Juncus conglomeratus (Juncaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Juncus effusus (Juncaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Juncus ensifolius (Juncaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Juncus fontanesii (Juncaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Juncus fontanesii subsp. fontanesii (Juncaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Juncus fontanesii subsp. pyramidatus (Juncaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Juncus gerardii (Juncaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Juncus gerardii subsp. gerardii (Juncaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Juncus imbricatus (Juncaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Juncus indescriptus (Juncaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Juncus inflexus (Juncaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Juncus maritimus (Juncaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Juncus membranaceus (Juncaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Juncus microcephalus (Juncaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Juncus oxycarpus (Juncaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Juncus papillosus (Juncaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Juncus planifolius (Juncaceae) | juncus | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Juncus polyanthemos (Juncaceae) | juncus | NOT native to Hawaii | ?unresearched | ?unresearched |
| Juncus prismatocarpus (Juncaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Juncus spp. (Juncaceae) | rush | NOT native to Hawaii | ?unresearched | ?unresearched |
| Juncus squarrosus (Juncaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Juncus subnodulosus (Juncaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Juncus tenuis (Juncaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Juncus usitatus (Juncaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Jungermannia subulata (Jungermanniaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Juniperus ashei (Cupressaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Juniperus bermudiana (Cupressaceae) | Bermuda juniper | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Juniperus chinensis (Cupressaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Juniperus communis (Cupressaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Juniperus deppeana (Cupressaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Juniperus occidentalis (Cupressaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Juniperus oxycedrus subsp. macrocarpa (Cupressaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Juniperus virginiana (Cupressaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Jussiaea linifolia (Onagraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Jussiaea repens (Onagraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Justicia aurea (Acanthaceae) | justicia | NOT native to Hawaii | ?unresearched | ?unresearched |
| Justicia betonica (Acanthaceae) | squirrel's tail, white shrimp plant | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Justicia brandegeeana (Acanthaceae) | shrimp plant | (unresearched) | ?unresearched | ?unresearched |
| Justicia carnea (Acanthaceae) | Brazilian plume, flamingo flower, pink jacobinia, pink plume-flower, plume flower | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Justicia procumbens (Acanthaceae) | waterwillow | NOT native to Hawaii | ?unresearched | ?unresearched |
| Justicia spicigera (Acanthaceae) | justicia | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Kadua sp. (Rubiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Kalanchoe beharensis (Crassulaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Kalanchoe blossfeldiana (Crassulaceae) | flaming Katie, flaming Katy, kalekana | NOT native to Hawaii | ?unresearched | ?unresearched |
| Kalanchoe daigremontianum (Crassulaceae) | devil's backbone, mother of millions | NOT native to Hawaii | ?unresearched | ?unresearched |
| Kalanchoe delagoensis (Crassulaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Kalanchoe fedtschenkoi (Crassulaceae) | lavender scallops | NOT native to Hawaii | ?unresearched | ?unresearched |
| Kalanchoe gastonis-bonnieri (Crassulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Kalanchoe grandiflora (Crassulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Kalanchoe laciniata (Crassulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Kalanchoe lateritia var. lateritia (Crassulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Kalanchoe pinnata (Crassulaceae) | air plant, kalanchoe | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Kalanchoe pinnatum (Crassulaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Kalanchoe sp. (Crassulaceae) | air plant | (unresearched) | ?unresearched | ?unresearched |
| Kalanchoe thyrsiflora (Crassulaceae) | dog tongue plant, flap jack | NOT native to Hawaii | ?unresearched | ?unresearched |
| Kalanchoe tubiflora (Crassulaceae) | chandelier plant | NOT native to Hawaii | ?unresearched | ?unresearched |
| Kalimeris indica (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Kallymenia sessilis (Kallymeniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Kallymenia thompsonii (Kallymeniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Kanaloa kahoolawensis (Fabaceae) | kanaloa | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Kappaphycus alvarezii (Solieriaceae) | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Kappaphycus striatum (Solieriaceae) | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Kennedia nigricans (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Kennedia rubicunda (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Kerria japonica (Rosaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Keysseria erici (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Keysseria helenae (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Keysseria maviensis (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Khaya senegalensis (Meliaceae) | African mahogany, bisselon, dry zone mahogany, Gambian mahogany, Senegal mahogany | NOT native to Hawaii | ?unresearched | ?unresearched |
| Kickxia elatine (Plantaginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Kickxia elatine subsp. elatine (Plantaginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Kickxia spuria subsp. integrifolia (Plantaginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Kigelia africana (Bignoniaceae) | sausage tree | NOT native to Hawaii | ?unresearched | ?unresearched |
| Kirkia acuminata (Kirkiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Kleinhovia hospita (Sterculiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Knautia arvensis (Dipsacaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Kniphofia uvaria (Asphodelaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Koanophyllon solidaginoides (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Kochia scoparia (Chenopodiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Koelreuteria elegans (Sapindaceae) | Chinese rain tree, flame gold, golden rain tree | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Koelreuteria elegans subsp. flamegold (Sapindaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Koelreuteria elegans subsp. formosana (Sapindaceae) | golden-rain tree | NOT native to Hawaii | ?unresearched | ?unresearched |
| Koelreuteria paniculata (Sapindaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Kokia cookei (Malvaceae) | [no common name known], kokia | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Kokia drynarioides (Malvaceae) | koki'o, kokia | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Kokia kauaiensis (Malvaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Kokia lanceolata (Malvaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Korthalsella complanata (Viscaceae) | hulumoa | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Korthalsella cylindrica (Viscaceae) | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Korthalsella degeneri (Viscaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Korthalsella latissima (Viscaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Korthalsella platycaula (Viscaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Korthalsella remyana (Viscaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Kuehneola uredinis (Phragmidiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Kummerowia stipulacea (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Kummerowia striata (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Kunzea ericoides (Myrtaceae) | burgan, kanuka, tree manuba, tree manuka, white teatree | NOT native to Hawaii | ?unresearched | ?unresearched |
| Kunzea sp. (Myrtaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Kurzia mauiensis (Lepidoziaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Kyllinga brevifolia (Cyperaceae) | green kyllinga, green water sedge, kaluhā, kili‘o‘opu, Kyllinga, manunēnē, mau‘u mokae, Mullumbimby couch, short kyllinga | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Kyllinga gracillima (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Kyllinga melanosperma (Cyperaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Kyllinga nemoralis (Cyperaceae) | kili‘o‘opu, Kyllinga, mau‘u mokae, white kyllinga, white water sedge, white-flowered kyllinga, whitehead spikesedge | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Kyllinga odorata (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Kyllinga polyphylla (Cyperaceae) | Navua sedge | NOT native to Hawaii | ?unresearched | ?unresearched |
| Lablab purpureus (Fabaceae) | bonavist, dolichos, Egyptian kidney bean, hyacinth bean, lablab, lablab bean, musical bean, pāpapa, pī, wild bean, wild bean creeper | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Lablab sp. (Fabaceae) | lablab | NOT native to Hawaii | ?unresearched | ?unresearched |
| Labordia cyrtandrae (Loganiaceae) | kamakahala | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Labordia degeneri (Loganiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Labordia fagraeoidea (Loganiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Labordia hedyosmifolia (Loganiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Labordia helleri (Loganiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Labordia hirtella (Loganiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Labordia hosakana (Loganiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Labordia kaalae (Loganiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Labordia lydgatei (Loganiaceae) | kamakahala | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Labordia pumila (Loganiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Labordia sessilis (Loganiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Labordia sp. nov. (Loganiaceae) | [no common name known] | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Labordia tinifolia (Loganiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Labordia tinifolia var. lanaiensis (Loganiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Labordia tinifolia var. tinifolia (Loganiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Labordia tinifolia var. wahiawaensis (Loganiaceae) | kamakahala | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Labordia triflora (Loganiaceae) | kamakahala | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Labordia venosa (Loganiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Labordia waialealae (Loganiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Labordia waiolani (Loganiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Laccospadix australasica (Arecaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lachenalia aloides (Hyacinthaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lachenalia aloides var. aurea (Hyacinthaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lachenalia bulbifera (Hyacinthaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lachenalia mutabilis (Hyacinthaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lachenalia reflexa (Hyacinthaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lachnellula willkommii (Hyaloscyphaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lactuca canadensis (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lactuca muralis (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lactuca pulchella (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lactuca saligna (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lactuca sativa (Asteraceae) | lettuce | NOT native to Hawaii | ?unresearched | ?unresearched |
| Lactuca serriola (Asteraceae) | prickly lettuce | NOT native to Hawaii | ?unresearched | ?unresearched |
| Lactuca tatarica (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lactuca virosa (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lagarosiphon major (Hydrocharitaceae) | African elodea, African oxygen weed, lagarosiphon, oxygen weed | NOT native to Hawaii | ?unresearched | ?unresearched |
| Lagarosiphon spp. (Hydrocharitaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lagenifera erici (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Lagenifera helenae (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Lagenifera maviensis (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Lagerstroemia duperreana (Lythraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lagerstroemia floribunda (Lythraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lagerstroemia indica (Lythraceae) | crape myrtle | NOT native to Hawaii | ?unresearched | ?unresearched |
| Lagerstroemia sp. (Lythraceae) | crape myrtle | NOT native to Hawaii | ?unresearched | ?unresearched |
| Lagunaria patersonia subsp. patersonia (Malvaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lagurus ovatus (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lamarckia aurea (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lamiastrum galeobdolon (Lamiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lamiastrum galeobdolon subsp. argentatum (Lamiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lamium album (Lamiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lamium amplexicaule (Lamiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lamium amplexicaule var. amplexicaule (Lamiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lamium galeobdolon subsp. argentatum (Lamiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lamium hybridum (Lamiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lamium maculatum (Lamiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lamium purpureum (Lamiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lampranthus amoenus (Aizoaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lampranthus glaucus (Aizoaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lampranthus multiradiatus (Aizoaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lampranthus roseus (Aizoaceae) | mini ice plant | NOT native to Hawaii | ?unresearched | ?unresearched |
| Lampranthus sp. (Aizoaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Lampranthus tegens (Aizoaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lampranthus zeyheri (Aizoaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Landoltia punctata (Lemnaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lansium domesticum (Meliaceae) | langsat | (unresearched) | ?unresearched | ?unresearched |
| Lantana camara (Verbenaceae) | la‘au kalakala, lakana, lanakana, lantana, mikinolia hihiu, mikinolia hohono, mikinolia kukū, red sage, shrub verbena, wild sage, yellow sage | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Lantana camara var. aculeata (Verbenaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lantana camara var. camara (Verbenaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lantana montevidensis (Verbenaceae) | creeping lantana, purple lantana, small lantana, trailing lantana, weeping lantana | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Lapageria rosea (Philesiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lappula occidentalis var. occidentalis (Boraginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lappula redowski (Boraginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lapsana communis (Asteraceae) | nipplewort | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Lapsana communis subsp. communis (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Larix decidua (Pinaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Larix spp. (Pinaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Lasiurus cinereus (Poaceae) | Hawaiian hoary bat | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Lasiurus cinereus subsp. semotus (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Latania loddigesii (Arecaceae) | blue latan palm | NOT native to Hawaii | ?unresearched | ?unresearched |
| Latania sp. (Arecaceae) | latan palm | NOT native to Hawaii | ?unresearched | ?unresearched |
| Latania verschaffeltii (Arecaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lathyrus angulatus (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lathyrus latifolius (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Lathyrus lusseri (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lathyrus odoratus (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Lathyrus sativus (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lathyrus sphaericus (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lathyrus sylestris (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lathyrus tingitanus (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Laurencia brachyclados (Rhodomelaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Laurencia crustiformans (Rhodomelaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Laurencia majuscula (Rhodomelaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Laurencia mcdermidiae (Rhodomelaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Laurencia nidifica (Rhodomelaceae) | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Lavandula officinalis (Lamiaceae) | lavander | (unresearched) | ?unresearched | ?unresearched |
| Lavandula stoechas (Lamiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Lavatera arborea (Malvaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lavatera cretica (Malvaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lechenaultia biloba (Goodeniaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lecythis pisonis (Lecythidaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Leea philippinensis (Leeaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Leea sp. (Leeaceae) | leea | (unresearched) | ?unresearched | ?unresearched |
| Leersia hexandra (Poaceae) | cutgrass, swamp rice grass | NOT native to Hawaii | ?unresearched | ?unresearched |
| Leersia japonica (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Leersia oryzoides (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Leersia sayanuka (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lellingeria saffordii (Grammitidaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lemna aequinoctialis (Lemnaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lemna gibba (Lemnaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lemna minor (Lemnaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lemna obscura (Lemnaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lemna paucicostata (Lemnaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lemna sp. (Lemnaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lemna spp. (Lemnaceae) | duckweed | NOT native to Hawaii | ?unresearched | ?unresearched |
| Lemna trisulca (Lemnaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Leonotis leonurus (Lamiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Leonotis nepetifolia (Lamiaceae) | bald head, bird honey, Christmas candlestick, Johnny Collins, lion's ear, lion's tail | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Leontodon autumnalis (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Leontodon hirtus (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Leontodon hispidus (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Leontodon saxatilis (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Leontodon taraxacoides (Asteraceae) | rough hawkbit | NOT native to Hawaii | ?unresearched | ?unresearched |
| Leontodon taraxacoides subsp. taraxacoides (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Leonurus cardiaca (Lamiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Leonurus japonicus (Lamiaceae) | Chinese motherwort, honeyweed, lion's tail, motherwort, Siberian motherwort | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Leonurus sibiricus (Lamiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lepechinia hastata (Lamiaceae) | pakaha, pitcher sage | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Lepidium africanum (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lepidium appelianum (Brassicaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Lepidium arbuscula (Brassicaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Lepidium bidentatum (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lepidium bidentatum var. o-waihiense (Brassicaceae) | anaunau, anounou, kunana, naunau | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Lepidium bidentatum var. remyi (Brassicaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Lepidium bonariense (Brassicaceae) | lepidium | NOT native to Hawaii | ?unresearched | ?unresearched |
| Lepidium campestre (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lepidium chalepense (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lepidium densiflorum (Brassicaceae) | lepidium | NOT native to Hawaii | ?unresearched | ?unresearched |
| Lepidium didymum (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lepidium draba (Brassicaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Lepidium draba subsp. draba (Brassicaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Lepidium latifolium (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lepidium oblongum (Brassicaceae) | peppergrass | NOT native to Hawaii | ?unresearched | ?unresearched |
| Lepidium orbiculare (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lepidium perfoliatum (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lepidium remyi (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lepidium ruderale (Brassicaceae) | peppergrass | NOT native to Hawaii | ?unresearched | ?unresearched |
| Lepidium sativum (Brassicaceae) | garden cress | NOT native to Hawaii | ?unresearched | ?unresearched |
| Lepidium serra (Brassicaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Lepidium sp. (Brassicaceae) | peppergrass | NOT native to Hawaii | ?unresearched | ?unresearched |
| Lepidium spp. (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lepidium strictum (Brassicaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lepidium virginicum (Brassicaceae) | peppergrass, poor man's pepper, Virginia cress, Virginia pepperweed, wild peppercress, wild peppergrass | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Lepidolejeunea involuta (Lejeuneaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Lepilaena australis (Potamogetonaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lepisorus thunbergianus (Polypodiaceae) | pakahakaha | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Leptecophylla tameiameiae (Epacridaceae) | aalii mahu, kawau, pukeawe, pukiawe | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Leptobryum pyriforme (Bryaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Leptochloa chinensis (Poaceae) | Asian sprangletop, Chinese sprangletop, red sprangletop | NOT native to Hawaii | ?unresearched | ?unresearched |
| Leptochloa fasicularis (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Leptochloa fusca (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Leptochloa mucronata (Poaceae) | red sprangletop | NOT native to Hawaii | ?unresearched | ?unresearched |
| Leptochloa panicea (Poaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Leptochloa scabra (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Leptochloa virgata (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Leptodontium flexifolium (Pottiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Leptolyngbya crosbyana (Oscillatoriaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Leptospermum ericoides (Myrtaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Leptospermum laevigatum (Myrtaceae) | Australian tea tree | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Leptospermum morrisonii (Myrtaceae) | tea tree | NOT native to Hawaii | PRESENT in Hawaii | ?unresearched |
| Leptospermum petersonii (Myrtaceae) | Australian tea tree | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Leptospermum polygalifolium (Myrtaceae) | tea tree | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Leptospermum rotundifolium (Myrtaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Leptospermum scoparium (Myrtaceae) | broom teatree, manuka, New Zealand tea tree, tea tree | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Lepturus repens (Poaceae) | lepturus | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Lepyrodiclis holosteoides (Caryophyllaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lepyrodiclis holstedoides (Caryophyllaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lespedeza bicolor (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lespedeza cuneata (Fabaceae) | Chinese bush-clover, Chinese lespedeza, perennial lespedeza, sericea lespedeza, silky bush-clover | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Lespedeza liukiuensis (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lespedeza stipulacea (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lespedeza striata (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lespedeza thunbergii (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Leucadendron argenteum (Proteaceae) | silver tree protea | NOT native to Hawaii | ?unresearched | ?unresearched |
| Leucadendron discolor (Proteaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Leucadendron sp. (Proteaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Leucaena diversifolia (Fabaceae) | upland koa haole | NOT native to Hawaii | ?unresearched | ?unresearched |
| Leucaena glauca (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Leucaena leucocephala (Fabaceae) | coffee bush, ēkoa, false koa, hedge acacia, horse tamarind, jumbie bean, koa haole, lead tree, leucaena, lilikoa, white popinac, wild tamarind | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Leucaena leucocephala subsp. leucocephala (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Leucaena sp. (Fabaceae) | koa haole | NOT native to Hawaii | ?unresearched | ?unresearched |
| Leucaena spp. (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Leucaena trichodes (Fabaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Leucaena xspontanea (Fabaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Leucanthemum maximum (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Leucanthemum vulgare (Asteraceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Leucas cephalotes (Lamiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Leucas decemdentata (Lamiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Leucas lavandulifolia (Lamiaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Leucas linifolia (Lamiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Leucas zeylanica (Lamiaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Leucobryum fumarioli (Leucobryaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Leucobryum gracile (Leucobryaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Leucobryum gracile var. gracile (Leucobryaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Leucobryum gracile var. hamatum (Leucobryaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Leucobryum hollianum (Leucobryaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Leucobryum pachyphyllum (Leucobryaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Leucobryum seemannii (Leucobryaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Leucobryum seemannii var. fumarioli (Leucobryaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Leucobryum seemannii var. seemannii (Leucobryaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Leucobryum seemannii var. solfatarae (Leucobryaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Leucobryum solfatarae (Leucobryaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Leucojum aestivum (Liliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Leucoloma hawaiiense (Dicranaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Leucoloma molle (Dicranaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Leucoloma scaberulum (Dicranaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Leucophanes glaucum (Leucobryaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Leucophyllum frutescens (Scrophulariaceae) | Texas ranger | NOT native to Hawaii | ?unresearched | ?unresearched |
| Leucospermum conocarpodendron (Proteaceae) | tree pincushion | NOT native to Hawaii | ?unresearched | ?unresearched |
| Leucospermum reflexum (Proteaceae) | rocket | NOT native to Hawaii | ?unresearched | ?unresearched |
| Leucospermum sp. (Proteaceae) | pincushion | NOT native to Hawaii | ?unresearched | ?unresearched |
| Leycesteria formosa (Caprifoliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Leymus multicaulis (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Leymus spp. (Poaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Liagora albicans (Liagoraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Liagora ceranoides (Liagoraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Liagora divaricata (Liagoraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Liagora donaldiana (Liagoraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Liagora perennis (Liagoraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Liagora spp. (Liagoraceae) | (unresearched) | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Liagora valida (Liagoraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Libertia formosa (Iridaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Licmophora abbreviata (Tabellariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Licuala grandis (Arecaceae) | licuala, ruffled fan palm | NOT native to Hawaii | ?unresearched | ?unresearched |
| Ligustrum amurense (Oleaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ligustrum indicum (Oleaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ligustrum japonicum (Oleaceae) | wax leaf privet | NOT native to Hawaii | ?unresearched | ?unresearched |
| Ligustrum japonicum var. rotundifolium (Oleaceae) | wax leaf privet | NOT native to Hawaii | ?unresearched | ?unresearched |
| Ligustrum lucidum (Oleaceae) | tree privet | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Ligustrum obtusifolium (Oleaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Ligustrum ovalifolium (Oleaceae) | California privet | NOT native to Hawaii | ?unresearched | ?unresearched |
| Ligustrum quihoui (Oleaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ligustrum robustum (Oleaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Ligustrum robustum subsp. walkeri (Oleaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Ligustrum sinense (Oleaceae) | Chinese privet, privet | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Ligustrum sp. (Oleaceae) | privet | NOT native to Hawaii | ?unresearched | ?unresearched |
| Ligustrum spp. (Oleaceae) | privet | NOT native to Hawaii | ?unresearched | ?unresearched |
| Ligustrum vulgare (Oleaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Lilaea scilloides (Juncaginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lilium formosanum (Liliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lilium lancifolium (Liliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lilium tigrinum (Liliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Limbella tricostata (Amblystegiaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Limnobium spongia (Hydrocharitaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Limnocharis flava (Limnocharitaceae) | limnocharis, sawah-flower rush, sawah-lettuce, velvetleaf, yellow bur-head | NOT native to Hawaii | ?unresearched | ?unresearched |
| Limnophila heterophylla var. reflexa (Scrophulariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Limnophila indica (Scrophulariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Limnophila sessiliflora (Scrophulariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Limnophila x ludoviciana (Scrophulariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Limonia acidissima (Rutaceae) | elephant apple, elephant-apple, Indian wood-apple, wood apple | NOT native to Hawaii | ?unresearched | ?unresearched |
| Limonium companyonis (Plumbaginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Limonium hyblaeum (Plumbaginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Limonium lobatum (Plumbaginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Limonium ramosissimum (Plumbaginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Limonium ramosissimum subsp. provinciale (Plumbaginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Limonium sinuatum (Plumbaginaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Limonium sp. (Plumbaginaceae) | statice | NOT native to Hawaii | ?unresearched | ?unresearched |
| Linaria arvensis (Scrophulariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Linaria dalmatica (Scrophulariaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Linaria dalmatica subsp. dalmatica (Scrophulariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Linaria genistifolia (Scrophulariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Linaria genistifolia subsp. dalmatica (Scrophulariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Linaria nigricans (Scrophulariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Linaria pelisseriana (Scrophulariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Linaria sp. (Scrophulariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Linaria vulgaris (Scrophulariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lindernia anagallidea (Scrophulariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lindernia anagallis (Scrophulariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lindernia antipoda (Scrophulariaceae) | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii | |
| Lindernia crustacea (Scrophulariaceae) | lindernia | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Lindernia dubia (Scrophulariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lindernia hyssopioides (Scrophulariaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lindernia nummulariifolia (Scrophulariaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Lindsaea repens var. macraeana (Lindsaeaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Lindsaeosoria flynnii (Lindsaeaceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Linociera intermedia (Oleaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Linum bienne (Linaceae) | pale flax | NOT native to Hawaii | ?unresearched | ?unresearched |
| Linum catharticum (Linaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Linum sp. (Linaceae) | flax | NOT native to Hawaii | ?unresearched | ?unresearched |
| Linum strictum subsp. strictum (Linaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Linum trigynum (Linaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Linum usitatissimum (Linaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Liparis hawaiensis (Orchidaceae) | Awapuhiakanaloa | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Lipocarpha chinensis (Cyperaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lipochaeta connata subsp. acris (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lipochaeta connata subsp. connata (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lipochaeta connata var. acris (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Lipochaeta connata var. connata (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Lipochaeta degeneri (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Lipochaeta fauriei (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Lipochaeta heterophylla (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Lipochaeta integrifolia (Asteraceae) | nehe | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Lipochaeta kamolensis (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Lipochaeta lavarum (Asteraceae) | nehe | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Lipochaeta lobata (Asteraceae) | nehe | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Lipochaeta lobata subsp. leptophylla (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lipochaeta lobata subsp. lobata (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lipochaeta lobata var. leptophylla (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Lipochaeta lobata var. lobata (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Lipochaeta micrantha (Asteraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Lipochaeta micrantha var. exigua (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Lipochaeta micrantha var. micrantha (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Lipochaeta ovata (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Lipochaeta perdita (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Lipochaeta remyi (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Lipochaeta rockii (Asteraceae) | nehe | NATIVE to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Lipochaeta sp. (Asteraceae) | nehe | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Lipochaeta subcordata (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Lipochaeta succulenta (Asteraceae) | nehe | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Lipochaeta tenuifolia (Asteraceae) | nehe | NATIVE to Hawaii | ?unresearched | ?unresearched |
| Lipochaeta tenuis (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Lipochaeta venosa (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Lipochaeta waimeaensis (Asteraceae) | NATIVE to Hawaii | ?unresearched | ?unresearched | |
| Liquidambar styraciflua (Hamamelidaceae) | red gum, sweet gum | NOT native to Hawaii | ?unresearched | ?unresearched |
| Liriope muscari (Liliaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Liriope sp. (Liliaceae) | NOT native to Hawaii | ?unresearched | ?unresearched | |
| Liriope spicata (Liliaceae) | creeping lilyturf, creeping liriope | NOT native to Hawaii | ?unresearched | ?unresearched |
| Liriope spicatum (Liliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Liriope spp. (Liliaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Litchi chinensis (Sapindaceae) | litchi, lychee | (unresearched) | ?unresearched | ?unresearched |
| Lithophyllum kotschyanum (Corallinaceae) | (unresearched) | ?unresearched | ?unresearched | |
| Litsea glutinosa (Lauraceae) | Indian laurel | NOT native to Hawaii | ?unresearched | ?unresearched |
| Litsea monopetala (Lauraceae) | yati | (unresearched) | ?unresearched | ?unresearched |
| Litsea spp. (Lauraceae) | (unresearched) | ?unresearched | ?unresearched | |
| Livistona chinensis (Arecaceae) | Chinese fan palm, Chinese fountain palm, fountain palm | NOT native to Hawaii | PRESENT in Hawaii | ESTABLISHED in Hawaii |
| Livistona concinna (Arecacea |