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Plants of Hawaii |
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| Scientific Name | Common Name | Family |
| Abelmoschus moschatus | muskmallow | Malvaceae |
| Abrus precatorius | black-eyed Susan | Fabaceae |
| Abutilon auritum | abutilon | Malvaceae |
| Abutilon eremitopetalum* | abutilon | Malvaceae |
| Abutilon grandifolium | hairy abutilon | Malvaceae |
| Abutilon incanum* | ma'o | Malvaceae |
| Abutilon indicum | abutilon | Malvaceae |
| Abutilon menziesii* | ko'oloa 'ula | Malvaceae |
| Abutilon sandwicense* | abutilon | Malvaceae |
| Acacia aneura | acacia | Fabaceae |
| Acacia auriculiformis+ | earpod wattle | Fabaceae |
| Acacia confusa | Formosa koa | Fabaceae |
| Acacia farnesiana | klu | Fabaceae |
| Acacia koa* | koa | Fabaceae |
| Acacia koaia* | koai'a | Fabaceae |
| Acacia mangium+ | mangium wattle | Fabaceae |
| Acacia mearnsii | black wattle | Fabaceae |
| Acacia melanoxylon | acacia | Fabaceae |
| Acacia parramattensis | acacia | Fabaceae |
| Acacia podalyriifolia+ | Queensland silver wattle | Fabaceae |
| Acacia retinodes+ | water wattle | Fabaceae |
| Acaena exigua* | liliwai | Rosaceae |
| Acanthocereus tetragonus | acanthocereus | Cactaceae |
| Acanthospermum australe | spiny-bur | Asteraceae |
| Acanthospermum hispidum | acanthospermum | Asteraceae |
| Achillea millefolium | common yarrow | Asteraceae |
| Achyranthes aspera var. aspera | achyranthes | Amaranthaceae |
| Achyranthes aspera var. pubescens | achyranthes | Amaranthaceae |
| Achyranthes atollensis* | achyranthes | Amaranthaceae |
| Achyranthes mutica* | achyranthes | Amaranthaceae |
| Achyranthes splendens var. rotundata* | achyranthes | Amaranthaceae |
| Achyranthes splendens var. splendens* | achyranthes | Amaranthaceae |
| Adenanthera pavonina | red sandalwood | Fabaceae |
| Adenophorus abietinus* | adenophorus | Grammitidaceae |
| Adenophorus epigaeus* | adenophorus | Grammitidaceae |
| Adenophorus haalilioanus* | adenophorus | Grammitidaceae |
| Adenophorus hymenophylloides* | pai | Grammitidaceae |
| Adenophorus nothsp. x_abbottiae* | adenophorus | Grammitidaceae |
| Adenophorus nothsp. x_bishopii* | adenophorus | Grammitidaceae |
| Adenophorus nothsp. x_carsonii* | adenophorus | Grammitidaceae |
| Adenophorus oahuensis* | adenophorus | Grammitidaceae |
| Adenophorus periens* | palai lä'au | Grammitidaceae |
| Adenophorus pinnatifidus var. pinnatifidus* | adenophorus | Grammitidaceae |
| Adenophorus pinnatifidus var. rockii* | adenophorus | Grammitidaceae |
| Adenophorus tamariscinus var. montanus* | wahine noho mauna | Grammitidaceae |
| Adenophorus tamariscinus var. tamariscinus* | wahine noho mauna | Grammitidaceae |
| Adenophorus tripinnatifidus* | adenophorus | Grammitidaceae |
| Adenostemma viscosum* | kämanamana | Asteraceae |
| Adiantum capillus-veneris* | 'iwa'iwa | Pteridaceae |
| Adiantum hispidulum | rough maidenhair fern | Pteridaceae |
| Adiantum raddianum | adiantum | Pteridaceae |
| Adiantum tenerum | brittle maidenhair fern | Pteridaceae |
| Aeschynomene paniculata | aeschynomene | Fabaceae |
| Agave sisalana | sisal | Agavaceae |
| Ageratina adenophora | Maui pämakani | Asteraceae |
| Ageratina riparia | Hämäkua pämakani | Asteraceae |
| Ageratum conyzoides | maile hohono | Asteraceae |
| Ageratum houstonianum | maile hohono | Asteraceae |
| Agrostis avenacea* | he'upueo | Poaceae |
| Agrostis canina | agrostis | Poaceae |
| Agrostis capillaris | agrostis | Poaceae |
| Agrostis exarata var. monolepis | agrostis | Poaceae |
| Agrostis sandwicensis* | agrostis | Poaceae |
| Agrostis stolonifera | redtop bentgrass | Poaceae |
| Aira caryophyllea | silver hairgrass | Poaceae |
| Albizia chinensis | albizia | Fabaceae |
| Albizia lebbeck | siris tree | Fabaceae |
| Albizia saponaria | albizia | Fabaceae |
| Alectryon macrococcus var. auwahiensis* | mähoe | Sapindaceae |
| Alectryon macrococcus var. macrococcus* | mähoe | Sapindaceae |
| Aleurites moluccana | kukui | Euphorbiaceae |
| Aleurites montana | candlenut | Euphorbiaceae |
| Alocasia cucullata | alocasia | Araceae |
| Alocasia macrorrhizos | 'ape | Araceae |
| Aloe vera | aloe | Aloeaceae |
| Alphitonia excelsa | alphitonia | Rhamnaceae |
| Alphitonia ponderosa* | kauila | Rhamnaceae |
| Alpinia mutica | small shell ginger | Zingiberaceae |
| Alpinia purpurata | red ginger | Zingiberaceae |
| Alpinia zerumbet | alpinia | Zingiberaceae |
| Alstonia macrophylla | alstonia | Apocynaceae |
| Alternanthera brasiliana | alternanthera | Amaranthaceae |
| Alternanthera caracasana | mat chaff flower | Amaranthaceae |
| Alternanthera pungens | khaki weed | Amaranthaceae |
| Alternanthera sessilis | sessile joyweed | Amaranthaceae |
| Alternanthera tenella | joyweed | Amaranthaceae |
| Alysicarpus vaginalis | alyce clover | Fabaceae |
| Alyxia stellata* | maile | Apocynaceae |
| Amaranthus brownii* | amaranthus | Amaranthaceae |
| Amaranthus dubius | spleen amaranth | Amaranthaceae |
| Amaranthus graecizans | amaranthus | Amaranthaceae |
| Amaranthus hybridus subsp. hybridus | green amaranth | Amaranthaceae |
| Amaranthus lividus subsp. polygonoides | amaranthus | Amaranthaceae |
| Amaranthus retroflexus | amaranthus | Amaranthaceae |
| Amaranthus spinosus | spiny amaranth | Amaranthaceae |
| Amaranthus viridis | slender amaranth | Amaranthaceae |
| Amauropelta globulifera* | palapalai a Kamapua'a | Thelypteridaceae |
| Ambrosia artemisiifolia | common ragweed | Asteraceae |
| Ammannia coccinea | toothcup | Lythraceae |
| Amsinckia intermedia | amsinckia | Boraginaceae |
| Anagallis arvensis | scarlet pimpernel | Primulaceae |
| Andropogon glomeratus | bluestem | Poaceae |
| Andropogon virginicus | broomsedge | Poaceae |
| Anemone hupehensis var. japonica | Japanese anemone | Ranunculaceae |
| Anethum graveolens | dill | Apiaceae |
| Angiopteris evecta | mule's-foot fern | Marattiaceae |
| Angophora costata | angophora | Myrtaceae |
| Annona cherimola | annona | Annonaceae |
| Anoectochilus sandvicensis* | jewel orchid | Orchidaceae |
| Anredera cordifolia+ | Madeira vine | Basellaceae |
| Anthemis cotula | mayweed | Asteraceae |
| Anthephora hermaphrodita | anthephora | Poaceae |
| Anthoxanthum odoratum | sweet vernalgrass | Poaceae |
| Antidesma platyphyllum var. hillebrandii* | hame | Euphorbiaceae |
| Antidesma platyphyllum var. platyphyllum* | hame | Euphorbiaceae |
| Antidesma pulvinatum* | hame | Euphorbiaceae |
| Antigonon leptopus | Mexican creeper | Polygonaceae |
| Antirrhinum orontium+ | lesser snapdragon | Scrophulariaceae |
| Aphelandra aurantiaca | aphelandra | Acanthaceae |
| Arachniodes insularis* | arachniodes | Dryopteridaceae |
| Araucaria columnaris | araucaria | Araucariaceae |
| Archontophoenix alexandrae+ | king palm | Arecaceae |
| Arctium lappa | great burdock | Asteraceae |
| Ardisia crenata | Hilo holly | Myrsinaceae |
| Ardisia elliptica | shoebutton ardisia | Myrsinaceae |
| Arenaria serpyllifolia | thyme-leaved sandwort | Caryophyllaceae |
| Arenga pinnata | arenga | Arecaceae |
| Argemone glauca var. decipiens* | pua kala | Papaveraceae |
| Argemone glauca var. glauca* | pua kala | Papaveraceae |
| Argemone mexicana | Mexican poppy | Papaveraceae |
| Argyreia nervosa | argyreia | Convolvulaceae |
| Argyroxiphium caliginis* | 'Eke silversword | Asteraceae |
| Argyroxiphium grayanum* | greensword | Asteraceae |
| Argyroxiphium kauense* | Ka'ü silversword | Asteraceae |
| Argyroxiphium sandwicense subsp. macrocephalum* | 'ähinahina | Asteraceae |
| Argyroxiphium sandwicense subsp. sandwicense* | 'ähinahina | Asteraceae |
| Argyroxiphium virescens* | greenswrod | Asteraceae |
| Aristea gerrardii | aristea | Iridaceae |
| Aristida adscensionis | aristida | Poaceae |
| Aristolochia littoralis+ | calico flower | Aristolochiaceae |
| Arrhenatherum elatius | arrhenatherum | Poaceae |
| Artabotrys hexapetalus | climbing ylang-ylang | Annonaceae |
| Artemisia australis* | 'ähinahina | Asteraceae |
| Artemisia kauaiensis* | 'ähinahina | Asteraceae |
| Artemisia mauiensis* | 'ähinahina | Asteraceae |
| Artemisia vulgaris | mugwort | Asteraceae |
| Arthraxon hispidus | arthraxon | Poaceae |
| Arthrostemma ciliatum | arthrostemma | Melastomataceae |
| Arundina graminifolia | bamboo orchid | Orchidaceae |
| Arundo donax+ | Spanish reed | Poaceae |
| Asclepias curassavica | butterfly weed | Asclepiadaceae |
| Asclepias physocarpa | balloon plant | Asclepiadaceae |
| Asparagus asparagoides | asparagus | Liliaceae |
| Asparagus densiflorus | asparagus | Liliaceae |
| Asparagus plumosus | asparagus | Liliaceae |
| Asplenium acuminatum* | lola | Aspleniaceae |
| Asplenium adiantum-nigrum* | 'iwa'iwa | Aspleniaceae |
| Asplenium aethiopicum* | 'iwa'iwa a Käne | Aspleniaceae |
| Asplenium contiguum var. contiguum* | asplenium | Aspleniaceae |
| Asplenium contiguum var. hirtulum* | asplenium | Aspleniaceae |
| Asplenium excisum* | pämoho | Aspleniaceae |
| Asplenium haleakalense* | asplenium | Aspleniaceae |
| Asplenium hobdyi* | asplenium | Aspleniaceae |
| Asplenium horridum var. glabratum* | 'iwa | Aspleniaceae |
| Asplenium horridum var. horridum* | 'iwa | Aspleniaceae |
| Asplenium insiticium* | pi'ipi'i lau manamana | Aspleniaceae |
| Asplenium kaulfussii f. bipinnatum* | küau | Aspleniaceae |
| Asplenium kaulfussii f. dareoides* | küau | Aspleniaceae |
| Asplenium kaulfussii f. gemmiparum* | küau | Aspleniaceae |
| Asplenium kaulfussii f. kaulfussii* | küau | Aspleniaceae |
| Asplenium lobulatum* | pi'ipi'i lau manamana | Aspleniaceae |
| Asplenium macraei* | 'iwa'iwa lau li'i | Aspleniaceae |
| Asplenium monanthes* | asplenium | Aspleniaceae |
| Asplenium nidus* | 'ëkaha | Aspleniaceae |
| Asplenium normale* | asplenium | Aspleniaceae |
| Asplenium peruvianum var. insulare* | asplenium | Aspleniaceae |
| Asplenium polyodon* | pünana manu | Aspleniaceae |
| Asplenium schizophyllum* | asplenium | Aspleniaceae |
| Asplenium sphenotomum* | asplenium | Aspleniaceae |
| Asplenium trichomanes subsp. densum* | 'oäli'i | Aspleniaceae |
| Asplenium unilaterale* | pämoho | Aspleniaceae |
| Asplenium x_flagrum* | asplenium | Aspleniaceae |
| Asplenium x_kokeense* | asplenium | Aspleniaceae |
| Asplenium x_sphenocookii* | asplenium | Aspleniaceae |
| Asplenium x_waikamoi* | asplenium | Aspleniaceae |
| Astelia argyrocoma* | pa'iniu | Liliaceae |
| Astelia menziesiana* | kaluaha | Liliaceae |
| Astelia waialealae* | pa'iniu | Liliaceae |
| Aster subulatus var. sandwicensis | annual saltmarsh aster | Asteraceae |
| Asystasia gangetica | Chinese violet | Acanthaceae |
| Athyrium microphyllum* | 'äkölea | Athyriaceae |
| Atriplex canescens | atriplex | Chenopodiaceae |
| Atriplex eardleyae | saltbush | Chenopodiaceae |
| Atriplex lentiformis | lens scale | Chenopodiaceae |
| Atriplex maximowicziana | saltbush | Chenopodiaceae |
| Atriplex semibaccata | Australian saltbush | Chenopodiaceae |
| Atriplex suberecta | saltbush | Chenopodiaceae |
| Avena barbata | avena | Poaceae |
| Avena fatua | wild oat | Poaceae |
| Avena sativa | cultivated oat | Poaceae |
| Axonopus compressus | axonopus | Poaceae |
| Axonopus fissifolius | narrow-leaved carpetgrass | Poaceae |
| Azolla filiculoides | mosquito fern | Azollaceae |
| Bacopa monnieri* | 'ae'ae (Ni'ihau) | Scrophulariaceae |
| Baltimora recta | baltimora | Asteraceae |
| Banksia integrifolia | banksia | Proteaceae |
| Barleria cristata | Philippine violet | Acanthaceae |
| Barleria repens | barleria | Acanthaceae |
| Basella alba | basella | Basellaceae |
| Bassia hyssopifolia+ | bassia | Chenopodiaceae |
| Bastardia viscosa | bastardia | Malvaceae |
| Batis maritima | pickleweed | Bataceae |
| Bauhinia monandra | bauhinia | Fabaceae |
| Begonia cucullata | begonia | Begoniaceae |
| Begonia foliosa | fuchsia begonia | Begoniaceae |
| Begonia fusca | begonia | Begoniaceae |
| Begonia hirtella | begonia | Begoniaceae |
| Begonia vitifolia | grape-leaf begonia | Begoniaceae |
| Bellis perennis | English daisy | Asteraceae |
| Bidens alba var. radiata | Spanish needle | Asteraceae |
| Bidens amplectens* | ko'oko'olau | Asteraceae |
| Bidens asymmetrica* | ko'oko'olau | Asteraceae |
| Bidens campylotheca subsp. campylotheca* | ko'oko'olau | Asteraceae |
| Bidens campylotheca subsp. pentamera* | ko'oko'olau | Asteraceae |
| Bidens campylotheca subsp. waihoiensis* | ko'oko'olau | Asteraceae |
| Bidens cervicata* | ko'oko'olau | Asteraceae |
| Bidens conjuncta* | ko'oko'olau | Asteraceae |
| Bidens cosmoides* | po'olä nui | Asteraceae |
| Bidens cynapiifolia | Spanish needle | Asteraceae |
| Bidens forbesii subsp. forbesii* | ko'oko'olau | Asteraceae |
| Bidens forbesii subsp. kahiliensis* | ko'oko'olau | Asteraceae |
| Bidens gardneri | bidens | Asteraceae |
| Bidens hawaiensis* | ko'oko'olau | Asteraceae |
| Bidens hillebrandiana subsp. hillebrandiana* | ko'oko'olau | Asteraceae |
| Bidens hillebrandiana subsp. polycephala* | ko'oko'olau | Asteraceae |
| Bidens macrocarpa* | ko'oko'olau | Asteraceae |
| Bidens mauiensis* | ko'oko'olau | Asteraceae |
| Bidens menziesii subsp. filiformis* | ko'oko'olau | Asteraceae |
| Bidens menziesii subsp. menziesii* | ko'oko'olau | Asteraceae |
| Bidens micrantha subsp. ctenophylla* | ko'oko'olau | Asteraceae |
| Bidens micrantha subsp. kalealaha* | ko'oko'olau | Asteraceae |
| Bidens micrantha subsp. micrantha* | ko'oko'olau | Asteraceae |
| Bidens molokaiensis* | ko'oko'olau | Asteraceae |
| Bidens pilosa | Spanish needle | Asteraceae |
| Bidens populifolia* | ko'oko'olau | Asteraceae |
| Bidens sandvicensis subsp. confusa* | ko'oko'olau | Asteraceae |
| Bidens sandvicensis subsp. sandvicensis* | ko'oko'olau | Asteraceae |
| Bidens torta* | ko'oko'olau | Asteraceae |
| Bidens valida* | ko'oko'olau | Asteraceae |
| Bidens wiebkei* | ko'oko'olau | Asteraceae |
| Bischofia javanica | koka | Euphorbiaceae |
| Bixa orellana | lipstick tree | Bixaceae |
| Blechnum appendiculatum | blechnum | Blechnaceae |
| Blechum pyramidatum | blechum | Acanthaceae |
| Blumea laciniata | blumea | Asteraceae |
| Blumea sessiliflora | blumea | Asteraceae |
| Blutaparon vermiculare | blutaparon | Amaranthaceae |
| Bobea brevipes* | 'ahakea lau li'i | Rubiaceae |
| Bobea elatior* | 'ahakea lau nui | Rubiaceae |
| Bobea sandwicensis* | 'ahakea | Rubiaceae |
| Bobea timonioides* | 'ahakea | Rubiaceae |
| Bocconia frutescens+ | bocconia | Papaveraceae |
| Boehmeria grandis* | 'äkölea | Urticaceae |
| Boerhavia acutifolia* | alena | Nyctaginaceae |
| Boerhavia coccinea | boerhavia | Nyctaginaceae |
| Boerhavia herbstii* | alena | Nyctaginaceae |
| Boerhavia repens* | alena | Nyctaginaceae |
| Bolboschoenus maritimus subsp. paludosus* | makai | Cyperaceae |
| Bonamia menziesii* | bonamia | Convolvulaceae |
| Bothriochloa barbinodis | fuzzy top | Poaceae |
| Bothriochloa bladhii | bothriochloa | Poaceae |
| Bothriochloa laguroides | bothriochloa | Poaceae |
| Bothriochloa pertusa | pitted beardgrass | Poaceae |
| Bothriospermum tenellum | bothriospermum | Boraginaceae |
| Bouteloua curtipendula | bouteloua | Poaceae |
| Brachiaria brizantha | brachiaria | Poaceae |
| Brachiaria distachya | brachiaria | Poaceae |
| Brachiaria mollis | brachiaria | Poaceae |
| Brachiaria mutica | California grass | Poaceae |
| Brachiaria plantaginea | brachiaria | Poaceae |
| Brachiaria reptans | brachiaria | Poaceae |
| Brachiaria subquadripara | brachiaria | Poaceae |
| Brassica juncea | Chinese mustard | Brassicaceae |
| Brassica nigra | black mustard | Brassicaceae |
| Brassica rapa | field mustard | Brassicaceae |
| Brexia madagascariensis+ | brexia | Grossulariaceae |
| Breynia disticha | snowbush | Euphorbiaceae |
| Brighamia insignis* | 'ölulu | Campanulaceae |
| Brighamia rockii* | pua 'ala | Campanulaceae |
| Briza maxima | big quaking grass | Poaceae |
| Briza minor | little quaking grass | Poaceae |
| Bromus catharticus | rescue grass | Poaceae |
| Bromus hordeaceus subsp. hordeaceus | soft chess | Poaceae |
| Bromus hordeaceus subsp. molliformis | soft chess | Poaceae |
| Bromus madritensis | bromegrass | Poaceae |
| Bromus rigidus | ripgut grass | Poaceae |
| Bromus rubens | bromegrass | Poaceae |
| Bromus secalinus | bromegrass | Poaceae |
| Bromus sterilis | bromegrass | Poaceae |
| Bromus tectorum | bromegrass | Poaceae |
| Broussaisia arguta* | kanawao | Hydrangeaceae |
| Broussonetia papyrifera | wauke | Moraceae |
| Brugmansia x_candida | angel's trumpet | Solanaceae |
| Bruguiera sexangula | Oriental mangrove | Rhizophoraceae |
| Bryophyllum daigremontianum | bryophyllum | Crassulaceae |
| Bryophyllum fedtschenkoi | bryophyllum | Crassulaceae |
| Bryophyllum pinnatum | air plant | Crassulaceae |
| Bryophyllum tubiflorum | chandelier plant | Crassulaceae |
| Buchnera pusilla | bluehearts | Scrophulariaceae |
| Buddleja asiatica | huelo 'ïlio | Buddlejaceae |
| Buddleja davidii+ | buddleja | Buddlejaceae |
| Buddleja madagascariensis+ | smoke bush | Buddlejaceae |
| Bulbostylis capillaris | bulbostylis | Cyperaceae |
| Caesalpinia bonduc* | käkalaioa | Fabaceae |
| Caesalpinia decapetala+ | wait-a-bit | Fabaceae |
| Caesalpinia kavaiensis* | uhiuhi | Fabaceae |
| Caesalpinia major | käkalaioa | Fabaceae |
| Cajanus cajan | pigeon pea | Fabaceae |
| Calamagrostis expansa* | reedgrass | Poaceae |
| Calamagrostis hillebrandii* | reedgrass | Poaceae |
| Calathea crotalifera | rattlesnake plant | Marantaceae |
| Callisia fragrans | inch plant | Commelinaceae |
| Callistopteris baldwinii* | callistopteris | Hymenophyllaceae |
| Callitris columellaris | callitris | Cupressaceae |
| Calophyllum inophyllum | kamani | Clusiaceae |
| Calopogonium galactioides | calopogonium | Fabaceae |
| Calotropis gigantea | calotropis | Asclepiadaceae |
| Calotropis procera | calotropis | Asclepiadaceae |
| Calyptocarpus vialis | calyptocarpus | Asteraceae |
| Camellia sinensis | camellia | Theaceae |
| Canavalia cathartica | maunaloa | Fabaceae |
| Canavalia galeata* | 'äwikiwiki | Fabaceae |
| Canavalia hawaiiensis* | 'äwikiwiki | Fabaceae |
| Canavalia kauaiensis* | 'äwikiwiki | Fabaceae |
| Canavalia molokaiensis* | 'äwikiwiki | Fabaceae |
| Canavalia napaliensis* | 'äwikiwiki | Fabaceae |
| Canavalia pubescens* | 'äwikiwiki | Fabaceae |
| Canavalia sericea | silky jackbean | Fabaceae |
| Canna indica | Indian shot | Cannaceae |
| Cannabis sativa subsp. indica | hemp | Cannabaceae |
| Capparis sandwichiana* | maiapilo | Capparaceae |
| Capsella bursa-pastoris | shepherd's purse | Brassicaceae |
| Capsicum annuum | bird pepper | Solanaceae |
| Cardamine flexuosa | bittercress | Brassicaceae |
| Cardamine hirsuta | hairy bittercress | Brassicaceae |
| Cardiospermum grandiflorum | heartseed | Sapindaceae |
| Cardiospermum halicacabum | heartseed | Sapindaceae |
| Carduus pycnocephalus | carduus | Asteraceae |
| Carex alligata* | carex | Cyperaceae |
| Carex echinata* | carex | Cyperaceae |
| Carex inversa | carex | Cyperaceae |
| Carex kauaiensis* | carex | Cyperaceae |
| Carex longii | carex | Cyperaceae |
| Carex macloviana subsp. subfusca* | carex | Cyperaceae |
| Carex meyenii* | carex | Cyperaceae |
| Carex montis-eeka* | carex | Cyperaceae |
| Carex thunbergii* | carex | Cyperaceae |
| Carex wahuensis subsp. herbstii* | carex | Cyperaceae |
| Carex wahuensis subsp. rubiginosa* | carex | Cyperaceae |
| Carex wahuensis subsp. wahuensis* | carex | Cyperaceae |
| Carica papaya | papaya | Caricaceae |
| Carmona retusa+ | carmona | Boraginaceae |
| Caryota mitis | caryota | Arecaceae |
| Cassytha filiformis* | kauna'oa pehu | Lauraceae |
| Castilleja arvensis | Indian paintbrush | Scrophulariaceae |
| Casuarina cunninghamiana | casuarina | Casuarinaceae |
| Casuarina equisetifolia | common ironwood | Casuarinaceae |
| Casuarina glauca | saltmarsh ironwood | Casuarinaceae |
| Catharanthus roseus | Madagascar periwinkle | Apocynaceae |
| Cecropia obtusifolia | guarumo | Cecropiaceae |
| Cedrela odorata | cedrela | Meliaceae |
| Celosia argentea | celosia | Amaranthaceae |
| Cenchrus agrimonioides var. agrimonioides* | kämanomano | Poaceae |
| Cenchrus agrimonioides var. laysanensis* | kämanomano | Poaceae |
| Cenchrus ciliaris | buffelgrass | Poaceae |
| Cenchrus echinatus | common sandbur | Poaceae |
| Cenchrus setigerus | sandbur | Poaceae |
| Cenchrus tribuloides | sandbur | Poaceae |
| Centaurea cyanus | centaurea | Asteraceae |
| Centaurea melitensis | Napa thistle | Asteraceae |
| Centaurium erythraea subsp. erythraea | bitter herb | Gentianaceae |
| Centaurium sebaeoides* | 'äwiwi | Gentianaceae |
| Centella asiatica | Asiatic pennywort | Apiaceae |
| Centranthus ruber subsp. ruber+ | red valerian | Valerianaceae |
| Centratherum punctatum subsp. punctatum | centratherum | Asteraceae |
| Centrosema pubescens | centrosema | Fabaceae |
| Cerastium fontanum subsp. triviale | common mouse-ear chickweed | Caryophyllaceae |
| Cerastium glomeratum | cerastium | Caryophyllaceae |
| Ceratophyllum demersum | hornwort | Ceratophyllaceae |
| Ceratopteris thalictroides | hihia wai | Pteridaceae |
| Cereus uruguayanus | hedge cactus | Cactaceae |
| Cestrum aurantiacum | orange cestrum | Solanaceae |
| Cestrum diurnum+ | day cestrum | Solanaceae |
| Cestrum nocturnum+ | night cestrum | Solanaceae |
| Chamaecrista nictitans subsp. patellaria var. glabrata | partridge pea | Fabaceae |
| Chamaesyce albomarginata | rattlesnake weed | Euphorbiaceae |
| Chamaesyce arnottiana* | 'akoko | Euphorbiaceae |
| Chamaesyce atrococca* | 'akoko | Euphorbiaceae |
| Chamaesyce celastroides var. amplectens* | 'akoko | Euphorbiaceae |
| Chamaesyce celastroides var. celastroides* | 'akoko | Euphorbiaceae |
| Chamaesyce celastroides var. hanapepensis* | 'akoko | Euphorbiaceae |
| Chamaesyce celastroides var. kaenana* | 'akoko | Euphorbiaceae |
| Chamaesyce celastroides var. laehiensis* | 'akoko | Euphorbiaceae |
| Chamaesyce celastroides var. lorifolia* | 'akoko | Euphorbiaceae |
| Chamaesyce celastroides var. stokesii* | 'akoko | Euphorbiaceae |
| Chamaesyce celastroides var. tomentella* | 'akoko | Euphorbiaceae |
| Chamaesyce clusiifolia* | 'akoko | Euphorbiaceae |
| Chamaesyce degeneri* | 'akoko | Euphorbiaceae |
| Chamaesyce deppeana* | 'akoko | Euphorbiaceae |
| Chamaesyce eleanoriae* | 'akoko | Euphorbiaceae |
| Chamaesyce halemanui* | 'akoko | Euphorbiaceae |
| Chamaesyce herbstii* | chamaesyce | Euphorbiaceae |
| Chamaesyce hirta | hairy spurge | Euphorbiaceae |
| Chamaesyce hypericifolia | graceful spurge | Euphorbiaceae |
| Chamaesyce hyssopifolia | spurge | Euphorbiaceae |
| Chamaesyce kuwaleana* | 'akoko | Euphorbiaceae |
| Chamaesyce maculata | spurge | Euphorbiaceae |
| Chamaesyce multiformis var. microphylla* | 'akoko | Euphorbiaceae |
| Chamaesyce multiformis var. multiformis* | 'akoko | Euphorbiaceae |
| Chamaesyce olowaluana* | 'akoko | Euphorbiaceae |
| Chamaesyce prostrata | prostrate spurge | Euphorbiaceae |
| Chamaesyce remyi var. hanaleiensis* | 'akoko | Euphorbiaceae |
| Chamaesyce remyi var. kauaiensis* | 'akoko | Euphorbiaceae |
| Chamaesyce remyi var. remyi* | 'akoko | Euphorbiaceae |
| Chamaesyce rockii* | 'akoko | Euphorbiaceae |
| Chamaesyce serpens | spurge | Euphorbiaceae |
| Chamaesyce skottsbergii var. skottsbergii* | 'akoko | Euphorbiaceae |
| Chamaesyce skottsbergii var. vaccinioides* | 'akoko | Euphorbiaceae |
| Chamaesyce sparsiflora* | 'akoko | Euphorbiaceae |
| Chamaesyce thymifolia | spurge | Euphorbiaceae |
| Charpentiera densiflora* | päpala | Amaranthaceae |
| Charpentiera elliptica* | päpala | Amaranthaceae |
| Charpentiera obovata* | päpala | Amaranthaceae |
| Charpentiera ovata var. niuensis* | päpala | Amaranthaceae |
| Charpentiera ovata var. ovata* | päpala | Amaranthaceae |
| Charpentiera tomentosa var. maakuaensis* | päpala | Amaranthaceae |
| Charpentiera tomentosa var. tomentosa* | charpentiera | Amaranthaceae |
| Cheilanthes viridis | green cliff brake | Pteridaceae |
| Cheirodendron dominii* | 'ölapa | Araliaceae |
| Cheirodendron fauriei* | 'ölapa | Araliaceae |
| Cheirodendron forbesii* | 'ölapa | Araliaceae |
| Cheirodendron platyphyllum subsp. kauaiense* | 'ölapa | Araliaceae |
| Cheirodendron platyphyllum subsp. platyphyllum* | 'ölapa | Araliaceae |
| Cheirodendron trigynum subsp. helleri* | 'ölapa | Araliaceae |
| Cheirodendron trigynum subsp. trigynum* | 'ölapa | Araliaceae |
| Chenopodium album | goosefoot | Chenopodiaceae |
| Chenopodium ambrosioides | Mexican tea | Chenopodiaceae |
| Chenopodium carinatum | goosefoot | Chenopodiaceae |
| Chenopodium hircinum | goosefoot | Chenopodiaceae |
| Chenopodium murale | goosefoot | Chenopodiaceae |
| Chenopodium oahuense* | 'äheahea | Chenopodiaceae |
| Chloris barbata | swollen fingergrass | Poaceae |
| Chloris divaricata var. cynodontioides | stargrass | Poaceae |
| Chloris divaricata var. divaricata | stargrass | Poaceae |
| Chloris gayana | Rhodes grass | Poaceae |
| Chloris radiata | radiate fingergrass | Poaceae |
| Chloris truncata | fingergrass | Poaceae |
| Chloris virgata | feather fingergrass | Poaceae |
| Christella boydiae* | christella | Thelypteridaceae |
| Christella cyatheoides* | kikawaiö | Thelypteridaceae |
| Christella dentata | pai'i'ihä | Thelypteridaceae |
| Christella parasitica | christella | Thelypteridaceae |
| Christella wailele* | christella | Thelypteridaceae |
| Christella x_intermedia* | christella | Thelypteridaceae |
| Christella x_palmeri* | christella | Thelypteridaceae |
| Chrysobalanus icaco+ | coco plum | Chrysobalanaceae |
| Chrysophyllum oliviforme | chrysophyllum | Sapotaceae |
| Chrysopogon aciculatus* | mänienie 'ula | Poaceae |
| Cibotium chamissoi* | häpu'u | Dicksoniaceae |
| Cibotium glaucum* | häpu'u | Dicksoniaceae |
| Cibotium menziesii* | häpu'u 'i'i | Dicksoniaceae |
| Cibotium nealiae* | häpu'u | Dicksoniaceae |
| Cibotium x_heleniae* | häpu'u | Dicksoniaceae |
| Ciclospermum leptophyllum | fir-leaved celery | Apiaceae |
| Cinchona caliseya+ | ledger quinine | Rubiaceae |
| Cinchona pubescens+ | quinine | Rubiaceae |
| Cinnamomum burmannii+ | padang cassia | Lauraceae |
| Cinnamomum camphora+ | camphor tree | Lauraceae |
| Cinnamomum verum+ | cinnamon tree | Lauraceae |
| Cirsium vulgare | bull thistle | Asteraceae |
| Cissus nodosa | grape ivy | Vitaceae |
| Cissus rhombifolia | cissus | Vitaceae |
| Cissus rotundifolia | grape ivy | Vitaceae |
| Citharexylum caudatum+ | fiddlewood | Verbenaceae |
| Citharexylum spinosum+ | fiddlewood | Verbenaceae |
| Cladium jamaicense* | 'uki | Cyperaceae |
| Claoxylon sandwicense* | po'olä | Euphorbiaceae |
| Cleome gynandra | wild spider flower | Capparaceae |
| Cleome spinosa* | honohina | Capparaceae |
| Clermontia arborescens subsp. arborescens* | 'öhä wai nui | Campanulaceae |
| Clermontia arborescens subsp. waihiae* | 'öhä wai nui | Campanulaceae |
| Clermontia arborescens subsp. waikoluensis* | 'öhä wai nui | Campanulaceae |
| Clermontia calophylla* | 'öhä wai | Campanulaceae |
| Clermontia clermontioides subsp. clermontioides* | 'öhä wai | Campanulaceae |
| Clermontia clermontioides subsp. rockiana* | 'öhä wai | Campanulaceae |
| Clermontia drepanomorpha* | 'öhä wai | Campanulaceae |
| Clermontia fauriei* | hähä'aiakamanu | Campanulaceae |
| Clermontia grandiflora subsp. grandiflora* | 'öhä wai | Campanulaceae |
| Clermontia grandiflora subsp. maxima* | 'öhä wai | Campanulaceae |
| Clermontia grandiflora subsp. munroi* | 'öhä wai | Campanulaceae |
| Clermontia hawaiiensis* | 'öhä këpau | Campanulaceae |
| Clermontia kakeana* | 'öhä wai | Campanulaceae |
| Clermontia kohalae* | 'öhä wai | Campanulaceae |
| Clermontia lindseyana* | 'öhä wai | Campanulaceae |
| Clermontia micrantha* | 'öhä wai | Campanulaceae |
| Clermontia montis-loa* | 'öhä wai | Campanulaceae |
| Clermontia multiflora* | 'öhä wai | Campanulaceae |
| Clermontia oblongifolia subsp. brevipes* | 'öhä wai | Campanulaceae |
| Clermontia oblongifolia subsp. mauiensis* | 'öhä wai | Campanulaceae |
| Clermontia oblongifolia subsp. oblongifolia* | 'öhä wai | Campanulaceae |
| Clermontia pallida* | 'öhä wai | Campanulaceae |
| Clermontia parviflora* | 'öhä wai | Campanulaceae |
| Clermontia peleana subsp. peleana* | 'öhä wai | Campanulaceae |
| Clermontia peleana subsp. singuliflora* | 'öhä wai | Campanulaceae |
| Clermontia persicifolia* | 'öhä wai | Campanulaceae |
| Clermontia pyrularia* | 'öhä wai | Campanulaceae |
| Clermontia samuelii subsp. hanaensis* | 'öhä wai | Campanulaceae |
| Clermontia samuelii subsp. samuelii* | 'öhä wai | Campanulaceae |
| Clermontia tuberculata* | 'öhä wai | Campanulaceae |
| Clermontia waimeae* | 'öhä wai | Campanulaceae |
| Clerodendrum buchananii var. fallax | clerodendrum | Verbenaceae |
| Clerodendrum chinense | pïkake hohono | Verbenaceae |
| Clerodendrum inerme+ | seaside clerodendrum | Verbenaceae |
| Clerodendrum macrostegium | clerodendrum | Verbenaceae |
| Clidemia hirta var. hirta | Koster's curse | Melastomataceae |
| Clitoria heterophylla | clitoria | Fabaceae |
| Clitoria ternatea | butterfly pea | Fabaceae |
| Clusia rosea+ | autograph tree | Clusiaceae |
| Coccinia grandis+ | ivy gourd | Cucurbitaceae |
| Coccoloba uvifera | sea grape | Polygonaceae |
| Cocculus orbiculatus* | huehue | Menispermaceae |
| Cocos nucifera | niu | Arecaceae |
| Coffea arabica | Arabian coffee | Rubiaceae |
| Coffea liberica | coffea | Rubiaceae |
| Coix lachryma-jobi | Job's-tears | Poaceae |
| Collomia linearis | collomia | Polemoniaceae |
| Colocasia esculenta | kalo | Araceae |
| Colubrina asiatica* | 'änapanapa | Rhamnaceae |
| Colubrina oppositifolia* | kauila | Rhamnaceae |
| Commelina benghalensis | hairy honohono | Commelinaceae |
| Commelina diffusa | honohono | Commelinaceae |
| Coniogramme pilosa* | lo'ulu | Pteridaceae |
| Conocarpus erectus | sea mulberry | Combretaceae |
| Convolvulus arvensis | field bindweed | Convolvulaceae |
| Convolvulus erubescens | convolvulus | Convolvulaceae |
| Conyza bonariensis | hairy horseweed | Asteraceae |
| Conyza canadensis var. canadensis | horseweed | Asteraceae |
| Conyza canadensis var. pusilla | horseweed | Asteraceae |
| Coprosma cymosa* | pilo | Rubiaceae |
| Coprosma elliptica* | pilo | Rubiaceae |
| Coprosma ernodeoides* | 'aiakanënë | Rubiaceae |
| Coprosma foliosa* | pilo | Rubiaceae |
| Coprosma kauensis* | köï | Rubiaceae |
| Coprosma longifolia* | pilo | Rubiaceae |
| Coprosma menziesii* | pilo | Rubiaceae |
| Coprosma montana* | pilo | Rubiaceae |
| Coprosma ochracea* | pilo | Rubiaceae |
| Coprosma pubens* | pilo | Rubiaceae |
| Coprosma rhynchocarpa* | pilo | Rubiaceae |
| Coprosma ternata* | pilo | Rubiaceae |
| Coprosma waimeae* | 'ölena | Rubiaceae |
| Cordia dichotoma | cordia | Boraginaceae |
| Cordia subcordata* | kou | Boraginaceae |
| Cordyline fruticosa | kï | Agavaceae |
| Coreopsis lanceolata | tickseed | Asteraceae |
| Coriandrum sativum | coriander | Apiaceae |
| Coronopus didymus | swinecress | Brassicaceae |
| Cortaderia jubata | cortaderia | Poaceae |
| Cortaderia spp.+ | pampas grass | Poaceae |
| Corymbia calophylla | marri | Myrtaceae |
| Corymbia citriodora | lemon-scented gum | Myrtaceae |
| Corymbia ficifolia | red-flowering gum | Myrtaceae |
| Corymbia gummifera | bloodwood | Myrtaceae |
| Corynocarpus laevigatus | karakanut | Corynocarpaceae |
| Costus dubius | costus | Costaceae |
| Costus pulverulentus | costus | Costaceae |
| Costus speciosus | crepe ginger | Costaceae |
| Costus woodsonii | costus | Costaceae |
| Cotoneaster pannosus+ | cotoneaster | Rosaceae |
| Cotula australis | Australian brass buttons | Asteraceae |
| Crassocephalum crepidioides | crassocephalum | Asteraceae |
| Crassula multicava | crassula | Crassulaceae |
| Crassula ovata | crassula | Crassulaceae |
| Crassula sieberiana | crassula | Crassulaceae |
| Crepis capillaris | hawk's-beard | Asteraceae |
| Crepis vesicaria subsp. taraxacifolia | crepis | Asteraceae |
| Cressa truxillensis* | cressa | Convolvulaceae |
| Crocosmia nothsp. x_crocosmiiflora | montbretia | Iridaceae |
| Crotalaria assamica | rattlepod | Fabaceae |
| Crotalaria berteroana | rattlepod | Fabaceae |
| Crotalaria brevidens | rattlepod | Fabaceae |
| Crotalaria incana | fuzzy rattlepod | Fabaceae |
| Crotalaria juncea | rattlepod | Fabaceae |
| Crotalaria lanceolata | rattlepod | Fabaceae |
| Crotalaria longirostrata | rattlepod | Fabaceae |
| Crotalaria micans | rattlepod | Fabaceae |
| Crotalaria pallida | smooth rattlepod | Fabaceae |
| Crotalaria pumila | rattlepod | Fabaceae |
| Crotalaria retusa | rattlepod | Fabaceae |
| Crotalaria spectabilis | kolomona (Ni'ihau) | Fabaceae |
| Crotalaria trichotoma | crotalaria | Fabaceae |
| Crotalaria verrucosa | rattlepod | Fabaceae |
| Croton guatemalensis | croton | Euphorbiaceae |
| Cryptocarya mannii* | hölio | Lauraceae |
| Cryptomeria japonica | cryptomeria | Taxodiaceae |
| Cryptostegia madagascariensis+ | cryptostegia | Asclepiadaceae |
| Cryptotaenia canadensis | honewort | Apiaceae |
| Ctenitis latifrons* | 'äkölea | Dryopteridaceae |
| Ctenitis squamigera* | pauoa | Dryopteridaceae |
| Cucumis dipsaceus | hedgehog gourd | Cucurbitaceae |
| Cuphea carthagenensis | tarweed | Lythraceae |
| Cuphea hyssopifolia | false heather | Lythraceae |
| Cuphea ignea | cigar flower | Lythraceae |
| Curcuma longa | 'ölena | Zingiberaceae |
| Cuscuta campestris | western field dodder | Cuscutaceae |
| Cuscuta sandwichiana* | kauna'oa | Cuscutaceae |
| Cyanea aculeatiflora* | hähä | Campanulaceae |
| Cyanea acuminata* | hähä | Campanulaceae |
| Cyanea angustifolia* | hähä | Campanulaceae |
| Cyanea arborea* | hähä | Campanulaceae |
| Cyanea asarifolia* | hähä | Campanulaceae |
| Cyanea asplenifolia* | hähä | Campanulaceae |
| Cyanea calycina* | hähä | Campanulaceae |
| Cyanea comata* | hähä | Campanulaceae |
| Cyanea copelandii subsp. copelandii* | hähä | Campanulaceae |
| Cyanea copelandii subsp. haleakalaensis* | hähä | Campanulaceae |
| Cyanea coriacea* | hähä | Campanulaceae |
| Cyanea crispa* | hähä | Campanulaceae |
| Cyanea cylindrocalyx* | hähä | Campanulaceae |
| Cyanea degeneriana* | hähä | Campanulaceae |
| Cyanea dolichopoda* | hähä | Campanulaceae |
| Cyanea dunbariae* | hähä | Campanulaceae |
| Cyanea duvalliorum* | hähä | Campanulaceae |
| Cyanea eleeleensis* | hähä | Campanulaceae |
| Cyanea elliptica* | hähä | Campanulaceae |
| Cyanea fissa subsp. fissa* | hähä | Campanulaceae |
| Cyanea fissa subsp. gayana* | hähä | Campanulaceae |
| Cyanea giffardii* | hähä | Campanulaceae |
| Cyanea glabra* | hähä | Campanulaceae |
| Cyanea grimesiana subsp. grimesiana* | hähä | Campanulaceae |
| Cyanea grimesiana subsp. obatae* | hähä | Campanulaceae |
| Cyanea habenata* | hähä | Campanulaceae |
| Cyanea hamatiflora subsp. carlsonii* | hähä | Campanulaceae |
| Cyanea hamatiflora subsp. hamatiflora* | hähä | Campanulaceae |
| Cyanea hardyi* | hähä | Campanulaceae |
| Cyanea hirtella* | hähä | Campanulaceae |
| Cyanea horrida* | hähä nui | Campanulaceae |
| Cyanea humboldtiana* | hähä | Campanulaceae |
| Cyanea kahiliensis* | hähä | Campanulaceae |
| Cyanea kolekoleensis* | hähä | Campanulaceae |
| Cyanea koolauensis* | hähä | Campanulaceae |
| Cyanea kuhihewa* | hähä | Campanulaceae |
| Cyanea kunthiana* | hähä | Campanulaceae |
| Cyanea lanceolata* | hähä | Campanulaceae |
| Cyanea leptostegia* | hähä lua | Campanulaceae |
| Cyanea linearifolia* | hähä | Campanulaceae |
| Cyanea lobata subsp. baldwinii* | hähä | Campanulaceae |
| Cyanea lobata subsp. lobata* | hähä | Campanulaceae |
| Cyanea longiflora* | hähä | Campanulaceae |
| Cyanea longissima* | hähä | Campanulaceae |
| Cyanea macrostegia subsp. gibsonii* | hähä | Campanulaceae |
| Cyanea macrostegia subsp. macrostegia* | hähä | Campanulaceae |
| Cyanea magnicalyx* | hähä | Campanulaceae |
| Cyanea mannii* | hähä | Campanulaceae |
| Cyanea maritae* | hähä | Campanulaceae |
| Cyanea marksii* | hähä | Campanulaceae |
| Cyanea mauiensis* | hähä | Campanulaceae |
| Cyanea mceldowneyi* | hähä | Campanulaceae |
| Cyanea membranacea* | hähä | Campanulaceae |
| Cyanea minutiflora* | hähä | Campanulaceae |
| Cyanea munroi* | hähä | Campanulaceae |
| Cyanea obtusa* | hähä | Campanulaceae |
| Cyanea parvifolia* | hähä | Campanulaceae |
| Cyanea pilosa subsp. longipedunculata* | hähä | Campanulaceae |
| Cyanea pilosa subsp. pilosa* | hähä | Campanulaceae |
| Cyanea pinnatifida* | hähä | Campanulaceae |
| Cyanea platyphylla* | 'akü'akü | Campanulaceae |
| Cyanea pohaku* | hähä | Campanulaceae |
| Cyanea procera* | hähä | Campanulaceae |
| Cyanea profuga* | hähä | Campanulaceae |
| Cyanea pseudofauriei* | hähä | Campanulaceae |
| Cyanea purpurellifolia* | hähä | Campanulaceae |
| Cyanea pycnocarpa* | hähä | Campanulaceae |
| Cyanea quercifolia* | hähä | Campanulaceae |
| Cyanea recta* | hähä | Campanulaceae |
| Cyanea remyi* | hähä | Campanulaceae |
| Cyanea rivularis* | cyanea | Campanulaceae |
| Cyanea scabra* | hähä | Campanulaceae |
| Cyanea sessilifolia* | hähä | Campanulaceae |
| Cyanea shipmanii* | hähä | Campanulaceae |
| Cyanea solanacea* | pöpolo | Campanulaceae |
| Cyanea solenocalyx* | pua kala | Campanulaceae |
| Cyanea spathulata* | hähä | Campanulaceae |
| Cyanea st.-johnii* | hähä | Campanulaceae |
| Cyanea stictophylla* | hähä | Campanulaceae |
| Cyanea superba subsp. regina* | hähä | Campanulaceae |
| Cyanea superba subsp. superba* | hähä | Campanulaceae |
| Cyanea sylvestris* | hähä | Campanulaceae |
| Cyanea tritomantha* | 'akü | Campanulaceae |
| Cyanea truncata* | hähä | Campanulaceae |
| Cyanea undulata* | hähä | Campanulaceae |
| Cyanthillium cinereum | little ironweed | Asteraceae |
| Cyclosorus interruptus* | neke | Thelypteridaceae |
| Cymbalaria muralis | Kenilworth-ivy | Scrophulariaceae |
| Cymbopogon refractus | barbwire grass | Poaceae |
| Cynodon aethiopicus | Bermuda grass | Poaceae |
| Cynodon dactylon | Bermuda grass | Poaceae |
| Cynodon nlemfuensis | Bermuda grass | Poaceae |
| Cynoglossum amabile | Chinese forget-me-not | Boraginaceae |
| Cyperus compressus | cyperus | Cyperaceae |
| Cyperus confertus | cyperus | Cyperaceae |
| Cyperus congestus | cyperus | Cyperaceae |
| Cyperus cyperinus* | cyperus | Cyperaceae |
| Cyperus cyperoides | cyperus | Cyperaceae |
| Cyperus difformis | cyperus | Cyperaceae |
| Cyperus eragrostis | cyperus | Cyperaceae |
| Cyperus esculentus | chufa | Cyperaceae |
| Cyperus fauriei* | cyperus | Cyperaceae |
| Cyperus gracilis | McCoy grass | Cyperaceae |
| Cyperus haspan | cyperus | Cyperaceae |
| Cyperus hillebrandii var. decipiens* | cyperus | Cyperaceae |
| Cyperus hillebrandii var. hillebrandii* | cyperus | Cyperaceae |
| Cyperus hypochlorus var. brevior* | 'ahu'awa | Cyperaceae |
| Cyperus hypochlorus var. hypochlorus* | 'ahu'awa | Cyperaceae |
| Cyperus involucratus | umbrella sedge | Cyperaceae |
| Cyperus javanicus* | 'ahu'awa | Cyperaceae |
| Cyperus laevigatus* | makaloa | Cyperaceae |
| Cyperus meyenianus | cyperus | Cyperaceae |
| Cyperus neokunthianus* | cyperus | Cyperaceae |
| Cyperus odoratus* | pu'uka'a | Cyperaceae |
| Cyperus papyrus | papyrus | Cyperaceae |
| Cyperus pennatiformis var. bryanii* | cyperus | Cyperaceae |
| Cyperus pennatiformis var. pennatiformis* | cyperus | Cyperaceae |
| Cyperus phleoides var. hawaiiensis* | cyperus | Cyperaceae |
| Cyperus phleoides var. phleoides* | cyperus | Cyperaceae |
| Cyperus pilosus | cyperus | Cyperaceae |
| Cyperus polystachyos* | cyperus | Cyperaceae |
| Cyperus prolifer | cyperus | Cyperaceae |
| Cyperus rockii* | cyperus | Cyperaceae |
| Cyperus rotundus | nut grass | Cyperaceae |
| Cyperus sandwicensis* | cyperus | Cyperaceae |
| Cyperus sanguinolentus | cyperus | Cyperaceae |
| Cyperus trachysanthos* | pu'uka'a (Ni'ihau) | Cyperaceae |
| Cyperus trinervis | cyperus | Cyperaceae |
| Cyperus virens | cyperus | Cyperaceae |
| Cyrtandra biserrata* | ha'iwale | Gesneriaceae |
| Cyrtandra calpidicarpa* | ha'iwale | Gesneriaceae |
| Cyrtandra confertiflora var. confertiflora* | ha'iwale | Gesneriaceae |
| Cyrtandra confertiflora var. obovata* | ha'iwale | Gesneriaceae |
| Cyrtandra cordifolia* | hahala | Gesneriaceae |
| Cyrtandra crenata* | ha'iwale | Gesneriaceae |
| Cyrtandra cyaneoides* | mäpele | Gesneriaceae |
| Cyrtandra dentata* | ha'iwale | Gesneriaceae |
| Cyrtandra filipes* | ha'iwale | Gesneriaceae |
| Cyrtandra garnotiana* | hahala | Gesneriaceae |
| Cyrtandra giffardii* | ha'iwale | Gesneriaceae |
| Cyrtandra gracilis* | ha'iwale | Gesneriaceae |
| Cyrtandra grandiflora* | ha'iwale | Gesneriaceae |
| Cyrtandra grayana* | ha'iwale | Gesneriaceae |
| Cyrtandra grayi* | ha'iwale | Gesneriaceae |
| Cyrtandra halawensis* | ha'iwale | Gesneriaceae |
| Cyrtandra hashimotoi* | ha'iwale | Gesneriaceae |
| Cyrtandra hawaiensis* | ha'iwale | Gesneriaceae |
| Cyrtandra hematos* | ha'iwale | Gesneriaceae |
| Cyrtandra kalihii* | ha'iwale | Gesneriaceae |
| Cyrtandra kauaiensis* | ulunahele | Gesneriaceae |
| Cyrtandra kaulantha* | ha'iwale | Gesneriaceae |
| Cyrtandra kealiae subsp. kealiae* | ha'iwale | Gesneriaceae |
| Cyrtandra kealiae subsp. urceolata* | ha'iwale | Gesneriaceae |
| Cyrtandra kohalae* | ha'iwale | Gesneriaceae |
| Cyrtandra laxiflora* | ha'iwale | Gesneriaceae |
| Cyrtandra lessoniana* | ha'iwale | Gesneriaceae |
| Cyrtandra longifolia* | ha'iwale | Gesneriaceae |
| Cyrtandra lydgatei* | ha'iwale | Gesneriaceae |
| Cyrtandra lysiosepala* | ha'iwale | Gesneriaceae |
| Cyrtandra macraei* | ha'iwale | Gesneriaceae |
| Cyrtandra macrocalyx* | ha'iwale | Gesneriaceae |
| Cyrtandra menziesii* | ha'iwale | Gesneriaceae |
| Cyrtandra munroi* | ha'iwale | Gesneriaceae |
| Cyrtandra oenobarba* | ha'iwale | Gesneriaceae |
| Cyrtandra olona* | ha'iwale | Gesneriaceae |
| Cyrtandra oxybapha* | ha'iwale | Gesneriaceae |
| Cyrtandra paliku* | cyrtandra | Gesneriaceae |
| Cyrtandra paludosa var. microcarpa* | moa | Gesneriaceae |
| Cyrtandra paludosa var. paludosa* | moa | Gesneriaceae |
| Cyrtandra pickeringii* | ha'iwale | Gesneriaceae |
| Cyrtandra platyphylla* | 'ilihia | Gesneriaceae |
| Cyrtandra polyantha* | ha'iwale | Gesneriaceae |
| Cyrtandra procera* | ha'iwale | Gesneriaceae |
| Cyrtandra propinqua* | ha'iwale | Gesneriaceae |
| Cyrtandra pruinosa* | ha'iwale | Gesneriaceae |
| Cyrtandra rivularis* | ha'iwale | Gesneriaceae |
| Cyrtandra sandwicensis* | ha'iwale | Gesneriaceae |
| Cyrtandra sessilis* | ha'iwale | Gesneriaceae |
| Cyrtandra spathulata* | ha'iwale | Gesneriaceae |
| Cyrtandra subumbellata* | ha'iwale | Gesneriaceae |
| Cyrtandra tintinnabula* | ha'iwale | Gesneriaceae |
| Cyrtandra viridiflora* | ha'iwale | Gesneriaceae |
| Cyrtandra waianaeensis* | hahala | Gesneriaceae |
| Cyrtandra waiolani* | ha'iwale | Gesneriaceae |
| Cyrtandra wawrae* | ha'iwale | Gesneriaceae |
| Cyrtomium caryotideum* | kä'ape'ape | Dryopteridaceae |
| Cyrtomium falcatum | holly fern | Dryopteridaceae |
| Cystopteris douglasii* | cystopteris | Athyriaceae |
| Cystopteris sandwicensis* | cystopteris | Athyriaceae |
| Cytisus palmensis | tagasaste | Fabaceae |
| Cytisus scoparius | Scotch broom | Fabaceae |
| Dacrycarpus imbricatus | dacrycarpus | Podocarpaceae |
| Dactylis glomerata | cocksfoot | Poaceae |
| Dactyloctenium aegyptium | beach wiregrass | Poaceae |
| Dalea emarginata | dalea | Fabaceae |
| Datura metel | horn-of-plenty | Solanaceae |
| Datura stramonium | jimson weed | Solanaceae |
| Daucus pusillus | American carrot | Apiaceae |
| Delairea odorata+ | German ivy | Asteraceae |
| Delissea argutidentata* | delissea | Campanulaceae |
| Delissea fallax* | delissea | Campanulaceae |
| Delissea fauriei* | delissea | Campanulaceae |
| Delissea kauaiensis* | delissea | Campanulaceae |
| Delissea laciniata* | delissea | Campanulaceae |
| Delissea lanaiensis* | delissea | Campanulaceae |
| Delissea lauliiana* | delissea | Campanulaceae |
| Delissea niihauensis* | delissea | Campanulaceae |
| Delissea parviflora* | delissea | Campanulaceae |
| Delissea rhytidosperma* | delissea | Campanulaceae |
| Delissea sinuata* | delissea | Campanulaceae |
| Delissea subcordata subsp. obtusifolia* | delissea | Campanulaceae |
| Delissea subcordata subsp. subcordata* | delissea | Campanulaceae |
| Delissea takeuchii* | delissea | Campanulaceae |
| Delissea undulata* | delissea | Campanulaceae |
| Delissea waianaeensis* | delissea | Campanulaceae |
| Delonix regia | royal poinciana | Fabaceae |
| Deparia cataracticola* | deparia | Athyriaceae |
| Deparia fenzliana* | deparia | Athyriaceae |
| Deparia kaalaana* | deparia | Athyriaceae |
| Deparia marginalis* | deparia | Athyriaceae |
| Deparia petersenii | deparia | Athyriaceae |
| Deparia prolifera* | deparia | Athyriaceae |
| Derris elliptica+ | derris | Fabaceae |
| Deschampsia nubigena* | hairgrass | Poaceae |
| Descurainia sophia | flixweed | Brassicaceae |
| Desmanthus pernambucanus | slender mimosa | Fabaceae |
| Desmodium cajanifolium | tick trefoil | Fabaceae |
| Desmodium heterocarpon var. strigosum | tick trefoil | Fabaceae |
| Desmodium heterophyllum | tick trefoil | Fabaceae |
| Desmodium incanum | Spanish clover | Fabaceae |
| Desmodium intortum | tick trefoil | Fabaceae |
| Desmodium sandwicense | Spanish clover | Fabaceae |
| Desmodium tortuosum | Florida beggarweed | Fabaceae |
| Desmodium triflorum | tick trefoil | Fabaceae |
| Dianella sandwicensis* | 'uki'uki | Liliaceae |
| Dianthus armeria subsp. armeria | Deptford pink | Caryophyllaceae |
| Dichanthelium cynodon* | dichanthelium | Poaceae |
| Dichanthelium hillebrandianum* | dichanthelium | Poaceae |
| Dichanthelium isachnoides* | dichanthelium | Poaceae |
| Dichanthelium koolauense* | dichanthelium | Poaceae |
| Dichanthium annulatum | Angleton grass | Poaceae |
| Dichanthium aristatum | Wilder grass | Poaceae |
| Dichanthium sericeum | Australian bluestem | Poaceae |
| Dichanthium tenue | dichanthium | Poaceae |
| Dichelachne crinita | dichelachne | Poaceae |
| Dichelachne micrantha | dichelachne | Poaceae |
| Dichondra micrantha | dichondra | Convolvulaceae |
| Dicksonia fibrosa | dicksonia | Dicksoniaceae |
| Dicliptera chinensis | dicliptera | Acanthaceae |
| Dicranopteris linearis f. emarginata* | uluhe | Gleicheniaceae |
| Dicranopteris linearis f. linearis* | uluhe | Gleicheniaceae |
| Dieffenbachia maculata | dieffenbachia | Araceae |
| Diellia erecta f. alexandri* | diellia | Aspleniaceae |
| Diellia erecta f. erecta* | palapalai lau li'i | Aspleniaceae |
| Diellia erecta f. pumila* | diellia | Aspleniaceae |
| Diellia falcata* | diellia | Aspleniaceae |
| Diellia leucostegioides* | diellia | Aspleniaceae |
| Diellia mannii* | diellia | Aspleniaceae |
| Diellia nothsp. x_lauii* | diellia | Aspleniaceae |
| Diellia pallida* | diellia | Aspleniaceae |
| Diellia unisora* | diellia | Aspleniaceae |
| Digitaria abyssinica | crabgrass | Poaceae |
| Digitaria ciliaris | Henry's crabgrass | Poaceae |
| Digitaria divaricatissima | digitaria | Poaceae |
| Digitaria eriantha | crabgrass | Poaceae |
| Digitaria fuscescens | creeping kükaepua'a | Poaceae |
| Digitaria horizontalis | crabgrass | Poaceae |
| Digitaria insularis | sourgrass | Poaceae |
| Digitaria radicosa | crabgrass | Poaceae |
| Digitaria setigera* | kükaepua'a | Poaceae |
| Digitaria violascens | smooth crabgrass | Poaceae |
| Dillenia suffruticosa | shrubby simpoh | Dilleniaceae |
| Dioclea wilsonii | sea bean | Fabaceae |
| Diodia apiculata | diodia | Rubiaceae |
| Dioscorea bulbifera | hoi | Dioscoreaceae |
| Dioscorea pentaphylla | pi'a | Dioscoreaceae |
| Diospyros hillebrandii* | lama | Ebenaceae |
| Diospyros sandwicensis* | lama | Ebenaceae |
| Diplazium arnottii* | hö'i'o | Athyriaceae |
| Diplazium esculentum | paca | Athyriaceae |
| Diplazium molokaiense* | diplazium | Athyriaceae |
| Diplazium sandwichianum* | hö'i'o | Athyriaceae |
| Diplopterygium pinnatum* | uluhe lau nui | Gleicheniaceae |
| Dissochondrus biflorus* | dissochondrus | Poaceae |
| Dissotis rotundifolia | dissotis | Melastomataceae |
| Distichlis spicata | distichlis | Poaceae |
| Dodonaea viscosa* | 'a'ali'i | Sapindaceae |
| Doodia kunthiana* | 'ökupukupu | Blechnaceae |
| Doodia lyonii* | doodia | Blechnaceae |
| Dopatrium junceum | dopatrium | Scrophulariaceae |
| Doryopteris angelica* | doryopteris | Pteridaceae |
| Doryopteris decipiens* | kumuniu | Pteridaceae |
| Doryopteris decora* | doryopteris | Pteridaceae |
| Doryopteris subdecipiens* | doryopteris | Pteridaceae |
| Doryopteris takeuchii* | doryopteris | Pteridaceae |
| Dovyalis hebecarpa | dovyalis | Flacourtiaceae |
| Drosera anglica* | mikinalo | Droseraceae |
| Drymaria cordata var. pacifica | pipili | Caryophyllaceae |
| Dryopteris crinalis var. crinalis* | palapalai 'aumakua | Dryopteridaceae |
| Dryopteris crinalis var. podosorus* | palapalai 'aumakua | Dryopteridaceae |
| Dryopteris fusco-atra var. fusco-atra* | 'i'i | Dryopteridaceae |
| Dryopteris fusco-atra var. lamoureuxii* | 'i'i | Dryopteridaceae |
| Dryopteris glabra var. alboviridis* | kïlau | Dryopteridaceae |
| Dryopteris glabra var. flynnii* | kïlau | Dryopteridaceae |
| Dryopteris glabra var. glabra* | kïlau | Dryopteridaceae |
| Dryopteris glabra var. hobdyana* | kïlau | Dryopteridaceae |
| Dryopteris glabra var. nuda* | kïlau | Dryopteridaceae |
| Dryopteris glabra var. pusilla* | kïlau | Dryopteridaceae |
| Dryopteris glabra var. soripes* | kïlau | Dryopteridaceae |
| Dryopteris hawaiiensis* | dryopteris | Dryopteridaceae |
| Dryopteris mauiensis* | dryopteris | Dryopteridaceae |
| Dryopteris sandwicensis* | dryopteris | Dryopteridaceae |
| Dryopteris subbipinnata* | dryopteris | Dryopteridaceae |
| Dryopteris tetrapinnata* | dryopteris | Dryopteridaceae |
| Dryopteris unidentata var. paleacea* | 'akole | Dryopteridaceae |
| Dryopteris unidentata var. unidentata* | 'akole | Dryopteridaceae |
| Dryopteris wallichiana* | 'i'o nui | Dryopteridaceae |
| Dubautia arborea* | na'ena'e | Asteraceae |
| Dubautia ciliolata subsp. ciliolata* | na'ena'e | Asteraceae |
| Dubautia ciliolata subsp. glutinosa* | na'ena'e | Asteraceae |
| Dubautia dolosa* | na'ena'e | Asteraceae |
| Dubautia herbstobatae* | na'ena'e | Asteraceae |
| Dubautia imbricata subsp. acronaea* | na'ena'e | Asteraceae |
| Dubautia imbricata subsp. imbricata* | na'ena'e | Asteraceae |
| Dubautia kalalauensis* | dubautia | Asteraceae |
| Dubautia kenwoodii* | na'ena'e | Asteraceae |
| Dubautia knudsenii subsp. filiformis* | na'ena'e | Asteraceae |
| Dubautia knudsenii subsp. knudsenii* | na'ena'e | Asteraceae |
| Dubautia knudsenii subsp. nagatae* | na'ena'e | Asteraceae |
| Dubautia laevigata* | na'ena'e | Asteraceae |
| Dubautia latifolia* | koholäpehu | Asteraceae |
| Dubautia laxa subsp. bryanii* | na'ena'e pua melemele | Asteraceae |
| Dubautia laxa subsp. hirsuta* | na'ena'e pua melemele | Asteraceae |
| Dubautia laxa subsp. laxa* | na'ena'e pua melemele | Asteraceae |
| Dubautia laxa subsp. pseudoplantaginea* | na'ena'e pua melemele | Asteraceae |
| Dubautia linearis subsp. hillebrandii* | na'ena'e | Asteraceae |
| Dubautia linearis subsp. linearis* | na'ena'e | Asteraceae |
| Dubautia linearis subsp. opposita* | na'ena'e | Asteraceae |
| Dubautia menziesii* | na'ena'e | Asteraceae |
| Dubautia microcephala* | na'ena'e | Asteraceae |
| Dubautia paleata* | na'ena'e pua kea | Asteraceae |
| Dubautia pauciflorula* | na'ena'e | Asteraceae |
| Dubautia plantaginea subsp. humilis* | na'ena'e | Asteraceae |
| Dubautia plantaginea subsp. magnifolia* | na'ena'e | Asteraceae |
| Dubautia plantaginea subsp. plantaginea* | na'ena'e | Asteraceae |
| Dubautia platyphylla* | na'ena'e | Asteraceae |
| Dubautia raillardioides* | na'ena'e 'ula | Asteraceae |
| Dubautia reticulata* | na'ena'e | Asteraceae |
| Dubautia scabra subsp. leiophylla* | na'ena'e | Asteraceae |
| Dubautia scabra subsp. scabra* | na'ena'e | Asteraceae |
| Dubautia sherffiana* | na'ena'e | Asteraceae |
| Dubautia syndetica* | na'ena'e | Asteraceae |
| Dubautia waialealae* | na'ena'e | Asteraceae |
| Duranta erecta | duranta | Verbenaceae |
| Dyssodia tenuiloba | dyssodia | Asteraceae |
| Echinochloa colona | jungle-rice | Poaceae |
| Echinochloa crus-galli | barnyard grass | Poaceae |
| Echinochloa oryzoides | echinochloa | Poaceae |
| Echinochloa picta | echinochloa | Poaceae |
| Echinochloa utilis | echinochloa | Poaceae |
| Eclipta prostrata | false daisy | Asteraceae |
| Egeria densa | egeria | Hydrocharitaceae |
| Ehrharta calycina | ehrharta | Poaceae |
| Ehrharta erecta | ehrharta | Poaceae |
| Ehrharta stipoides | meadow ricegrass | Poaceae |
| Eichhornia crassipes | water hyacinth | Pontederiaceae |
| Elaeagnus umbellata | oleaster | Elaeagnaceae |
| Elaeocarpus angustifolius | elaeocarpus | Elaeocarpaceae |
| Elaeocarpus bifidus* | kalia | Elaeocarpaceae |
| Elaphoglossum aemulum* | 'ëkaha | Elaphoglossaceae |
| Elaphoglossum alatum* | hoe a Mäui | Elaphoglossaceae |
| Elaphoglossum crassicaule* | hoe a Mäui | Elaphoglossaceae |
| Elaphoglossum crassifolium* | hoe a Mäui | Elaphoglossaceae |
| Elaphoglossum fauriei* | hoe a Mäui | Elaphoglossaceae |
| Elaphoglossum paleaceum* | mäku'e | Elaphoglossaceae |
| Elaphoglossum parvisquameum* | hoe a Mäui | Elaphoglossaceae |
| Elaphoglossum pellucidum* | hoe a Mäui | Elaphoglossaceae |
| Elaphoglossum wawrae* | laukahi | Elaphoglossaceae |
| Eleocharis calva* | kohekohe | Cyperaceae |
| Eleocharis geniculata | spikerush | Cyperaceae |
| Eleocharis obtusa* | kohekohe | Cyperaceae |
| Eleocharis olivacea | spikerush | Cyperaceae |
| Eleocharis radicans | spikerush | Cyperaceae |
| Eleocharis schaffneri | spikerush | Cyperaceae |
| Elephantopus mollis | elephant's-foot | Asteraceae |
| Eleusine indica | wiregrass | Poaceae |
| Embelia pacifica* | kilioe | Myrsinaceae |
| Emex spinosa | emex | Polygonaceae |
| Emilia coccinea | Flora's paintbrush | Asteraceae |
| Emilia fosbergii | pualele (Ni'ihau) | Asteraceae |
| Emilia sonchifolia var. javanica | Flora's paintbrush | Asteraceae |
| Emilia sonchifolia var. sonchifolia | Flora's paintbrush | Asteraceae |
| Encelia farinosa | brittle bush | Asteraceae |
| Enchylaena tomentosa var. tomentosa+ | enchylaena | Chenopodiaceae |
| Enneapogon desvauxii | enneapogon | Poaceae |
| Entada phaseoloides* | St. Thomas bean | Fabaceae |
| Entolasia marginata | entolasia | Poaceae |
| Epidendrum nothsp. x_obrienianum | scarlet orchid | Orchidaceae |
| Epilobium billardierianum subsp. cinereum | willow herb | Onagraceae |
| Epilobium ciliatum | willow herb | Onagraceae |