Pacific Island Ecosystems at Risk (PIER)
Report on invasive plant species in Tonga
Appendix 2.
Table 1.
Species that are invasive elsewhere in similar ecosystems but are not known to be present
in Tonga
Table 2. Introduced species that are invasive elsewhere
and are also invasive or potentially invasive in Tonga
Table 3. Species that are reported as invasive or weedy
elsewhere and are common or weedy in Tonga
Table 4. Native and naturalized species that exhibit
aggressive behavior
| Scientific Name | Common Names | Family | Habit |
| Acacia confusa | English: Formosa koa, Formosa acacia; Other: sosigi, shoshigi, sosugi, boiffuring (Guam and CNMI–Chamorro); serepa, soschghi (CNMI–Carolinian); pilampwoia (Pohnpei); ianángi, yanangi (Palau) | Fabaceae | tree |
| Acacia farnesiana | English: Ellington curse, klu, sweet acacia; French: cassie; Other: aroma, popinac, kandaroma (Guam, CNMI); kolu (Hawai'i); vaivai vaka-vatona, vaivai vakavotona, ban baburi, oki (Fiji); te kaibakoa (Kiribati); debena (Nauru) | Fabaceae | shrub |
| Acacia longifolia | English: Sydney golden wattle, golden wattle, long-leaved wattle, long-leaved acacia, sallow wattle, coast wattle, golden rods | Fabaceae | tree |
| Acacia mangium | English: mangium; Other: tuhkehn pwelmwahu (Pohnpei) | Fabaceae | tree |
| Acacia mearnsii | English: black wattle; French: acacia noir | Fabaceae | tree |
| Acacia melanoxylon | English: Australian blackwood, blackwood acacia | Fabaceae | tree |
| Acacia nilotica | English: prickly acacia, black thorn, Egyptian thorn, Nile acacia, algaroba, babul, gum arabic tree; French: acacia à gomme; Spanish: algarrobo; Other: tiare (New Caledonia) | Fabaceae | tree |
| Acacia spp. | English: acacia | Fabaceae | shrubs/trees |
| Agave sisalana | English: sisal, sisal hemp; Other: ndali, natali (Fiji); Other: ndali, natali (Fiji), malina (Hawai'i) | Agavaceae | herb |
| Ageratina riparia | English: spreading mistflower, creeping croftonweed, river eupatorium; Other: hamakua pamakani (Hawai‘i) | Asteraceae | shrub |
| Ailanthus altissima | English: tree of heaven, varnishtree | Simaroubaceae | tree |
| Albizia chinensis | English: Chinese albizia, silktree | Fabaceae | tree |
| Alstonia macrophylla | English: devil-tree | Apocynaceae | tree |
| Alternanthera philoxeroides | English: alligator weed | Amaranthaceae | herb |
| Andropogon gayanus | English: gamba grass, tambuki grass | Poaceae | grass |
| Andropogon glomeratus | English: bush beardgrass, bushy bluestem | Poaceae | grass |
| Andropogon virginicus | English: broomsedge, yellow bluestem, whisky grass | Poaceae | grass |
| Annona glabra | English: pond apple, alligator apple, bullock's heart, cherimoyer; French: annone des marais, corossolier des marais; Other: uto ni mbulumakau, uto ni bulumakau, kaitambo, kaitambu (Fiji) | Annonaceae | tree |
| Anredera cordifolia | English: Madeira vine, mignonette vine, lamb's tails; Other: ‘uala hupe (Hawai‘i); filikafa (Niue) | Basellaceae | vine |
| Araujia sericifera | English: moth plant, moth catcher, white bladder flower | Asclepiadaceae | shrub |
| Ardisia crenata | English: hen's eyes, Hilo holly, coral berry, Australian holly, scratchthroat; French: arbre à noël | Myrsinaceae | shrub |
| Ardisia elliptica | English: shoebutton ardisia; Other: ati popa'a, atiu (French Polynesia) | Myrsinaceae | shrub |
| Arthrostemma ciliatum | English: everblooming eavender | Melastomataceae | herb |
| Austroeupatorium inulaefolium | Asteraceae | herb | |
| Axonopus compressus | English: blanket grass, carpetgrass; Other: kambutu ni vavalangi (Fiji), vaolima (Samoa) | Poaceae | grass |
| Azadirachta indica | English: neem, nim, margosa | Meliaceae | tree |
| Azolla pinnata | English: mosquito fern, ferny azolla, water velvet | Azollaceae | fern |
| Barleria lupulina | English: hophead, Philippine violet | Acanthaceae | shrub |
| Barleria prionitis | English: barleria, porcupine flower | Acanthaceae | shrub |
| Bauhinia purpurea | English: purple orchid tree; purple butterfly tree, pink butterfly tree (Fiji); French: fleurs pourpres | Fabaceae | tree |
| Bauhinia variegata | English: orchid tree; mountain ebony, butterfly tree (Fiji); French: bois de boeuf, sabot boeuf, arbre de Saint-Thomas | Fabaceae | tree |
| Blainvillea gayana | Asteraceae | herb | |
| Bocconia frutescens | English: bocconia, plume-poppy, tree celandine, parrotweed | Papaveraceae | shrub |
| Boerhavia coccinea | English: boerhavia, hog weed, hog feed, red spiderling, wineflower, tar vine; Other: mata pavo, patagon | Nyctaginaceae | herb |
| Brillantaisia lamium | Acanthaceae | shrub | |
| Bryophyllum delagoense | English: chandelier plant | Crassulaceae | herb |
| Buddleja asiatica | English: dog tail; Other: huelo ‘ilio (Hawai'i) | Scrophulariaceae | shrub |
| Buddleja davidii | English: orange eye, butterfly bush, summer lilac | Scrophulariaceae | shrub |
| Buddleja madagascariensis | English: butterfly bush, smoke bush | Scrophulariaceae | shrub |
| Caesalpinia decapetala | English: cats claw, Mysore thorn, Mauritius thorn, wait-a-bit; French: bois sappan; Other: puakelekino (Hawai'i) | Fabaceae | shrub |
| Calamus spp. | English: rattan; Other: rotan, bejuko-n-halumtano, rotan bejuro-n-halumtan (Guam); bangerenguis ra ngebard (Palau) | Arecaceae | shrub (palm) |
| Calliandra haematocephala | English: red powder puff; French: pompon | Fabaceae | shrub |
| Calliandra surinamensis | English: Surinamese stickpea | Fabaceae | tree |
| Callisia fragrans | English: fragrant inch plant, basketplant, spironema | Commelinaceae | herb |
| Calopogonium mucunoides | English: calopo; Other: akankan-guakag (Guam) | Fabaceae | vine |
| Calotropis gigantea | English: calotrope, crown flower, bowstring hemp, madar; French: mercure végétal, mudar; Other: pua-kalaunu (Hawai'i); tahinu (French Polynesia) | Ascelepiadaceae | shrub |
| Calotropis procera | English: calotropis, rubber bush, apple of Sodom, mudar, madar, king’s crown, roostertree; French: arbre à soie | Asclepiadaceae | shrub/tree |
| Cardiospermum grandiflorum | English: balloon vine; heart seed | Sapindaceae | vine |
| Carpobrotus edulis | English: ice plant, pigface, hottentot fig | Aizoaceae | succulent |
| Castilla elastica | English: Panama rubber tree, Mexican rubber tree, uletree; Other: pulu mamoe (American Samoa) | Moraceae | tree |
| Casuarina glauca | English: swamp oak, saltmarsh ironwood, longleaf ironwood, gray sheoak | Casuarinaceae | tree |
| Cecropia obtusifolia | English: trumpet tree, guarumo | Cecropiaceae | tree |
| Cecropia peltata | English: trumpet tree; French: parasolier, faux-ricin, pisse-roux, bois cannon | Cecropiaceae | tree |
| Cenchrus brownii | English: burgrass, burr grass, sand-bur, slimbristle sandbur | Poaceae | grass |
| Cestrum parqui | English: green cestrum, willow-leaved jessamine, Chilean cestrum, green poison-berry | Solanaceae | shrub |
| Chromolaena odorata | English: Siam weed, triffid weed, bitter bush, Jack in the bush; French: herbe du Laos; Other: kesengesil, masigsig (Guam); otuot (Chuuk), ngesngesil (Palau); wisolmatenrehwei (Pohnpei); mahsrihsrihk (Kosrae); hagonoy, agonoi, huluhagonoi (Philippines) | Asteraceae | herb |
| Chrysobalanus icaco | English: coco plum, icaco; French: icacier, icaquier, icaque, prune colon; Other: apolo (Fiji) | Chrysobalanaceae | shrub |
| Chrysophyllum oliviforme | English: satin leaf, wild star-apple, damson plum; Spanish: caimitillo | Sapotaceae | tree |
| Cinchona pubescens | English: quinine tree, red cinchona; French: quinquina rouge; Spanish: cascarilla | Rubiaceae | tree |
| Cinnamomum burmanni | English: padang cassia; French: cannelier de Malaisie | Lauraceae | tree |
| Cinnamomum camphora | English: camphor tree, camphor laurel; French: camphre, camphrier | Lauraceae | tree |
| Cinnamomum verum | English: cinnamon tree; French: cannelier de Ceylan; Other: ochod ra ngebard (Palau). tinamoni, tigamoni (American Samoa and Samoa) | Lauraceae | tree |
| Cirsium vulgare | English: spear thistle, Scotch thistle, bull thistle, black thistle, plume thistle; Other: pua kali (Hawai'i) | Asteraceae | herb |
| Cissus nodosa | English: grape ivy | Vitaceae | liana |
| Citharexylum caudatum | English: juniper berry | Verbenaceae | tree |
| Citharexylum spinosum | English: fiddlewood; Other: masese (Fiji) | Verbenaceae | tree |
| Clausena excavata | English: clausena | Rutaceae | tree |
| Clerodendrum chinense | English: Honolulu rose, stickbush, glory bower; Other: losa Honolulu, losa onolulu (American Samoa and Samoa); pikake hohono, pikake wauke (Hawai'i), pitate mama (Cook Islands) | Verbenaceae | shrub |
| Clerodendrum japonicum | English: glorybower | Verbenaceae | shrub |
| Clerodendrum paniculatum | English: pagoda plant, pagoda flower; Other: butcherechár, butecherechar (Palau); tukehn sousou (Pohnpei) | Verbenaceae | shrub |
| Clerodendrum quadriloculare | English: bronze-leaved clerodendrum; Other: tirooj in belle (Marshall Islands); kleuang (Palau); tuhkehn palau (Pohnpei), bagauac (Philippines) | Verbenaceae | shrub |
| Clidemia hirta | English: Koster’s curse, soap bush; French: canot-macaque; Other: kui, kúi (Palau); kauresinga, kaurasinga, roinisinga, ndraunisinga, mara na bulumakau, mbona na mbulamakau, vuti (Fiji); kaurasiga (from Ecoport, no source given) | Melastomataceae | shrub |
| Clusia rosea | English: signature tree, autograph tree, copey, Scotch attorney, pitchapple | Guttiferae | tree |
| Conocarpus erectus | English: sea mulberry, buttonwood, button mangrove | Combretaceae | shrub/tree |
| Cordia curassavica | English: black sage | Boraginaceae | shrub |
| Cordia glabra | English: broad-leaved cordia | Boraginaceae | tree |
| Cortaderia jubata | English: jubata grass, Andean pampas grass, purple pampas grass | Poaceae | grass |
| Cortaderia selloana | English: pampas grass, silver pampas grass, Uruguayan pampas grass | Poaceae | grass |
| Corynocarpus laevigatus | English: New Zealand laurel, karakara nut | Corynocarpaceae | tree |
| Crotalaria micans | English: crotalaria; Other: pine kotalelia, pile (Niue) | Fabaceae | shrub |
| Cryptostegia grandiflora | English: rubber vine, India rubber vine, Palay rubbervine; Other: liane de gatope (New Caledonia) | Asclepiadaceae | vine |
| Cryptostegia madagascariensis | English: Madagascar rubbervine | Asclepiadaceae | vine |
| Cupaniopsis anacardioides | English: carrotwood, tuckeroo | Sapindaceae | tree |
| Cuscuta campestris | English: golden dodder, field dodder, five-angled dodder; Other: navereverelangi, wa vereverelangi, wa lawala, wa mbosuthu, wa ndanga, wa tikaivu, ndithangi (Fiji) | Convolvulaceae | vine |
| Cyathea cooperi | English: Australian tree fern | Cyatheaceae | fern |
| Dalbergia sissoo | English: Indian dalbergia, Indian rosewood, sissoo, shisham; French: ébénier juane | Fabaceae | tree |
| Delairea odorata | English: German ivy, Italian ivy, cape ivy | Asteraceae | vine |
| Derris elliptica | English: derris; Other: tuba, bagin (Guam); oop, op (Kosrae); dub (Palau); up (Chuuk, Pohnpei); peinuhp, uhp, upanai, upanyap, upkesetik (Pohnpei); yuub (Yap); nduva, duva ni vavalagi, nduva ni vavalangi (Fiji) | Fabaceae | vine |
| Desmanthus virgatus | Other: anil, jureminha (Brazil) | Fabaceae | herb |
| Desmodium nicaraguense | Spanish: engorda-caballo, vara de arco, pie de paloma, vara larga, vara blanca, Juana de Arco, gutao, Juana Larga | Fabaceae | shrub |
| Dichrostachys cinerea | English: aroma, Kalahari Christmas tree, Chinese lantern tree, sickle bush, marabou-thorn, marabú, Sen Domeng, Saint Domingue, acacia Saint Domingue | Fabaceae | shrub |
| Digitaria insularis | English: cottongrass, sourgrass, feather-top grass | Poaceae | grass |
| Dillenia suffruticosa | English: shrubby dillenia, shrubby simpoh | Dilleniaceae | shrub/tree |
| Dissotis rotundifolia | English: dissotis, Spanish shawl, pink lady | Melastomataceae | herb |
| Echinochloa polystachya | English: aleman grass, carib grass, creeping rivergrass | Poaceae | grass |
| Egeria densa | English: egeria, leafy elodea, dense waterweed | Hydrocharitaceae | aquatic herb |
| Eichhornia crassipes | English: water hyacinth; French: jacinthe d'eau; Other: bung el ralm (Palau); mbekambekairanga, ndambendambe ni nga, jal khumbe, bekabekairaga, dabedabe ne ga, jal khumbe (Fiji); riri vai (Cook Islands) | Pontederiaceae | aquatic herb |
| Elaeis guineensis | English: African oil palm; French: palmier à huile d'Afrique; Other: apwiraiasi (Pohnpei) | Arecaceae | tree |
| Epipremnum pinnatum cv. 'Aureum' | English: pothos, money plant; Other: yalu, wa yalu, wa lu, alu, halu, waloa, matha, nanggalanggala, nanggalinggali, tonga, tanga (Fiji); alu (Tonga) | Araceae | vine |
| Erigeron karvinskianus | English: Mexican daisy, seaside daisy, daisy fleabane | Asteraceae | herb |
| Ficus altissima | English: lofty fig, false banyan, council tree | Moraceae | tree |
| Ficus benghalensis | English: banyan, Indian banyan, vada tree; French: figuier des pagodes | Moraceae | tree |
| Ficus elastica | English: India rubber tree, rubber plant; Other: komunoki, komunokí (Palau); rapah (Pohnpei); gak'iynigoma (Yap) | Moraceae | tree |
| Ficus macrophylla | English: Moreton Bay fig | Moraceae | tree |
| Ficus nota | English: tibig | Moraceae | tree |
| Ficus rubiginosa | English: rusty-leaved fig, Port Jackson fig, littleleaf fig | Moraceae | tree |
| Flindersia brayleyana | English: Queensland maple, silkwood | Rutaceae | tree |
| Funtumia elastica | English: African rubber tree, silkrubber; French: arbre à caoutchouc; Other: pulu vao (Samoa) | Apocynaceae | tree |
| Furcraea hexapetala | English: Cuban hemp, hemp; Other: cubuya (Galapagos Islands) | Agavaceae | succulent |
| Gomphocarpus physocarpus | English: balloon plant, bladderbush | Asclepiadaceae | shrub |
| Grevillea banksii | English: kahili flower, Banks grevillea; Other: ha‘iku, kahili (Hawai‘i); ‘oka pua ‘ula‘ula (Hawai‘i (Ni‘ihau)) | Proteaceae | tree |
| Grewia asiatica | English: phalsa | Tiliaceae | tree |
| Gymnocoronis spilanthoides | English: Senegal tea, temple plant | Asteraceae | herb |
| Haematoxylum campechianum | English: logwood, bloodwood tree, campeachy wood, campeche | Fabaceae | tree |
| Harungana madagascariensis | English: harungana | Clusiaceae | tree |
| Hedychium gardnerianum | English: kahili gingerOther: cevuga dromodromo (Fiji); kahili, ‘awapuhi kahili (Hawai‘i); sinter weitahta (Pohnpei) | Zingiberaceae | herb |
| Heliocarpus popayanensis | English: moho, white moho | Tiliaceae | tree |
| Heterocentron subtriplinervium | English: pearl flower | Melastomataceae | herb |
| Hiptage benghalensis | English: hiptage; French: liane de cerf | Malpighiaceae | shrub |
| Hydrilla verticillata | English: hydrilla, Florida elodea, water thyme | Hydrocharitaceae | herb |
| Hylocereus undatus | English: night-blooming cereus, strawberry pear, red pitaya, dragon fruit, pitahaya; French: pitaya, pitahaya rouge; Spanish: flor de Caliz; Other: paniniokapunahou, papipi pua (Hawai'i) | Cactaceae | succulent |
| Hymenachne amplexicaulis | English: hymenachne, trompetilla, West Indian marsh grass | Poaceae | grass |
| Hyparrhenia rufa | English: jaragua grass, thatching grass | Poaceae | grass |
| Hypochoeris radicata | English: hairy cat’s ear, gosmore | Asteraceae | herb |
| Hyptis capitata | English: knobweed; Other: botones, batunes (Guam); t'aiegarabao, pathpath (Yap), maa uupo (French Polynesia) | Lamiaceae | herb |
| Hyptis suaveolens | English: wild spikenard, chan; French: gros baume, hyptis à odeur; Other: mumutun (Guam) | Lamiaceae | herb |
| Imperata cylindrica | English: blady grass, cogon grass, satintail; French: paille de dys, paillotte, impérata cylindrique, impérate; Other: gi, ngi (Fiji); alang-alang, lalang (Indonesia, Malaysia); kasoring (Palau) | Poaceae | grass |
| Ischaemum polystachyum | English: paddle grass; Other: mah (Kosrae); reh padil (Pohnpei) | Poaceae | grass |
| Ischaemum rugosum | English: muraina grass, wrinkle duck-beak, saramatta grass; Other: tho muraina, co muraina (Fiji) | Poaceae | grass |
| Ischaemum timorense | English: centipede grass, stalkleaf murainagrass, lucuntu grass; Other: waidoi grass (Fiji) | Poaceae | grass |
| Jacaranda mimosifolia | English: jacaranda | Bignoniaceae | tree |
| Jasminum fluminense | English: Brazilian jasmine | Oleaceae | vine |
| Jatropha gossypiifolia | English: bellyache bush, cotton-leaved physic nut | Euphorbiaceae | shrub |
| Juncus spp. | English: rush | Juncaceae | rush |
| Justicia carnea | English: pink plume-flower, pink jacobinia | Acanthaceae | shrub |
| Kunzea ericoides | English: tree manuka, tree manuba, kanuka (New Zealand), burgan, white teatree | Myrtaceae | tree |
| Khaya senegalensis | English: African mahogany, Senegal mahogany | Meliaceae | tree |
| Kyllinga polyphylla | English: Navua sedge; Other: tuise tele, tuise fiti (Samoa) | Cyperaceae | sedge |
| Leonotis nepetifolia | English: lion’s tail, lion’s ear, Christmas candlestick; French: gros bouton, gros tête | Lamiaceae | herb |
| Leptospermum scoparium | English: New Zealand tea; manuka (New Zealand) | Myrtaceae | tree |
| Licuala grandis | English: ruffled fan palm; French: palmier-cuillère | Arecaceae | tree (palm) |
| Lophostemon confertus | English: brush box, Brisbane box, vinegar tree | Myrtaceae | tree |
| Ludwigia peruviana | English: ludwigia, Peruvian primrose, water primrose | Onagraceae | shrub |
| Macfadyena unguis-cati | English: cat's-claw climber | Bignoniaceae | vine |
| Maesopsis eminii | English: umbrella tree, musizi | Rhamnaceae | tree |
| Medinilla magnifica | English: chandelier tree, showy melastome, showy medinilla, Malaysian orchid | Melastomataceae | shrub |
| Medinilla venosa | English: holdtight | Melastomataceae | shrub |
| Melaleuca quinquenervia | English: melaleuca, cajeput, paper bark tree, punk tree; Other: niaouli (New Caledonia) | Myrtaceae | tree |
| Melastoma candidum | English: Asian melastome, Indian rhododendron, Malabar melastome | Melastomataceae | tree |
| Melastoma sanguineum | English: fox-tongued melastoma, red melastome | Melastomataceae | shrub/tree |
| Melicoccus bijugatus | English: Spanish lime | Sapindaceae | tree |
| Melochia umbellata | English: melochia | Sterculiaceae | tree |
| Memecylon floribundum | Melastomataceae | shrub | |
| Merremia tuberosa | English: wood rose, Spanish arborvine, yellow morning-glory; French: liane-à-tonelle, liane-jaune; Other: pilikai (Hawai'i) | Convolvulaceae | vine |
| Miconia calvescens | English: miconia, velvetleaf, purple plague, bush currant | Melastomataceae | tree |
| Microlaena stipoides | English: meadow ricegrass, weeping grass | Poaceae | grass |
| Mikania scandens | English: climbing hempweed, climbing hempvine | Asteraceae | vine |
| Mimosa diplotricha | English: giant sensitive plant, nila grass; French: grande sensitive, sensitive gèante; Other: singbiguin sasa (Saipan); mechiuaiuu (Palau); limemeihr laud (Pohnpei); vao fefe palagi (American Samoa and Samoa), la'au fefe tele, la'au fefe palagi (Samoa); wa ngandrongandro levu, wa ngandrongandro ni wa ngalelevu, co gadrogadro (Fiji) | Fabaceae | shrub |
| Mimosa pigra | English: catclaw mimosa, thorny sensitiveplant, giant mimosa, giant sensitive plant, black mimosa, zaraz, dormilona, bashful plant, amourette violet; French: amourette riviére | Fabaceae | shrub |
| Montanoa hibiscifolia | English: montanoa, tree daisy, Anzac flower | Asteraceae | shrub |
| Morella faya | English: fayatree, firetree, firebush | Myricaceae | tree |
| Mucuna pruriens | English: cow itch, velvet bean, Bengal bean, Mauritius bean; French: pois pouilleux, poil à gratter; Other: akangkang dangkulo (Guam) | Fabaceae | vine |
| Muntingia calabura | English: jam tree, strawberry tree, Jamaican cherry, Singapore cherry, Panama cherry, Panama berry, ornamental cherry, calabura, sirsen; French: bois ramier; Other: budo (Yap, Palau); manzanilla, mansanita, manzanita (Guam, CNMI), capulin (Fiji, French Polynesia) | Tiliaceae | tree |
| Myriophyllum aquaticum | English: parrot's feather, water feather, Brazilian water milfoil | Haloragidaceae | aquatic herb |
| Ochna kirkii | English: Micky Mouse plant, bird’s-eye bush | Ochnaceae | shrub/tree |
| Ochna serrulata | English: ochna, Mickey-Mouse plant, bird’s-eye bush | Ochnaceae | shrub |
| Ochroma pyramidale | English: balsa, corkwood, down tree | Bombacaceae | tree |
| Ossaea marginata | Melastomataceae | shrub | |
| Oxyspora paniculata | English: oxyspora, bristletips | Melastomataceae | shrub |
| Paederia foetida | English: stink vine, skunk vine; Other: maile pilau, maile ka kahiki (Hawai'i). | Rubiaceae | vine |
| Panicum repens | English: torpedo grass, couch panicum, creeping panic; French: panic rampant, millet rampant; Other: wainaku grass (Hawai'i) | Poaceae | grass |
| Paraserianthes lophantha | English: brush wattle, plume albizia, plume acacia, stink bean | Fabaceae | shrub/tree |
| Parkinsonia aculeata | English: parkinsonia, Jerusalem thorn, horse-bean, retama; French: arrêtenègre; Spanish: palo verde | Fabaceae | tree |
| Parthenium hysterophorus | English: bitterweed, carrot grass, false ragweed, feverfew, parthenium weed, ragweed parthenium, whitetop, Santa Maria | Asteraceae | herb |
| Paspalum urvillei | English: Vasey grass; French: herbe de Vasey, paspalum d'Urville | Poaceae | grass |
| Passiflora alata | English: wild passion fruit, wingstem passionflower | Passifloraceae | shrub |
| Passiflora caerulea | English: blue passion flower | Passifloraceae | shrub |
| Passiflora coccinea | English: scarlet passion flower, red passion flower, red granadilla | Passifloraceae | shrub |
| Passiflora ligularis | English: sweet granadilla, yellow passionfruit; French: granadille, grenadille douce, barbadine; French: granadille, grenadille douce, barbadine; Other: lemi wai, lani wai, lemona (Hawai‘i) | Passifloraceae | vine |
| Passiflora pulchella | English: two-lobed passion flower, wingleaf passionfruit | Passifloraceae | shrub |
| Passiflora rubra | English: red passionfruit, Dutchman's laudanum | Passifloraceae | vine |
| Passiflora tarminiana | English: banana poka, banana passionfruit, bananadilla | Passifloraceae | vine |
| Paulownia tomentosa | English: paulownia, princess-tree, Chinese empress tree, karri-tree | Scrophulariaceae | tree |
| Pennisetum clandestinum | English: kikuyu grass, kikuyo | Poaceae | grass |
| Pennisetum polystachion | English: mission grass, feathery pennisetum; French: queue de chat; Other: mechen katu (Chuuk), pwokso, dipw rais (Pohnpei), o tamata (Fiji) | Poaceae | grass |
| Pennisetum purpureum | English: elephant grass, napier grass, merker grass; French: herbe éléphant, fausse canne à sucre; Spanish: pasto elefante; Other: bokso (Palau); puk-soh (Pohnpei); acfucsracsracsr (Kosrae). | Poaceae | grass |
| Pennisetum setaceum | English: fountain grass | Poaceae | grass |
| Philadelphus karwinskyanus | English: philadelphus, evergreen mock orange, syringa | Saxifragaceae | shrub |
| Phormium tenax | English: New Zealand flax, New Zealand hemp, bush flax | Agavaceae | herb |
| Phyllostachys nigra | English: black bamboo; French: bambou noir | Poaceae | shrub |
| Piper aduncum | English: spiked pepper; Other: yaqona ni Onolulu, yanggona ni Onolulu (Fiji) | Piperaceae | tree |
| Pistia stratiotes | English: water lettuce, tropical duckweed; French: laitue d'eau, pistie; Other: lechuguita de agua, repollo de agua , apon-apon, apoe-apoe, beo-cai, chawk | Araceae | aquatic herb |
| Pithecellobium dulce | English: Madras thorn, Manila tamarind; French: pois sucré; Other: kamachuri (Chuuk); camachili, kamachile, kamachiles, kamachili (Guam); kamachili, kamatire (CNMI Chamorro), ghamasiligh (CNMI-Carolinian); kamatsiri, kamatsíri, opiuma (Palau): 'opiuma (Hawai'i); kataiya (Fiji) | Fabaceae | tree |
| Pittosporum pentandrum | English: pittosporum, Taiwanese cheesewood, mamalis | Pittosporaceae | shrub/tree |
| Pittosporum tobira | English: tobira, Japanese pittosporum, Japanese cheesewood, mock orange, Australian laurel | Pittosporaceae | shrub/tree |
| Pittosporum undulatum | English: Victorian box, Victorian laurel, Australian cheesewood, mock orange, sweet pittosporum, orange pittosporum | Pittosporaceae | tree |
| Pittosporum viridiflorum | English: cape pittosporum | Pittosporaceae | tree |
| Platycerium bifurcatum | English: elkhorn fern, staghorn fern | Selaginellaceae | fern |
| Pluchea indica | English: Indian fleabane, Indian pluchea, Indian camphorweed | Asteraceae | shrub |
| Praxelis clematidea | English: praxelis | Asteraceae | herb |
| Prosopis spp. | English: mesquite, algaroba; Spanish: algarrobo | Fabaceae | tree |
| Psidium cattleianum | English: strawberry guava, cherry guava, Cattley guava, Chinese guava; French: goyavier de Chine; Other: kuahpa (Pohnpei); waiawi ‘ula‘ula (Hawai'i); ngguava (Fiji), tuava tinito (French Polynesia); kua‘va (Samoa) | Myrtaceae | tree |
| Psidium guineense | English: Brazilian guava, Guinea guava; French: goyavier du Brésil | Myrtaceae | shrub/tree |
| Pueraria phaseoloides | English: tropical kudzu, puero | Fabaceae | vine |
| Quisqualis indica | English: Rangoon creeper | Combretaceae | vine |
| Ravenala madagascariensis | English: traveler’s palm, traveler’s tree, ravenale; French: arbre à voyageur | Strelitziaceae | tree |
| Rhodomyrtus tomentosa | English: rose myrtle, downy myrtle, Isenberg bush | Myrtaceae | shrub |
| Rhynchospora caduca | Cyperaceae | herb | |
| Rubus alceifolius | English: giant bramble | Rosaceae | shrub |
| Rubus moluccanus | English: Molucca raspberry, broad leafed bramble, Molucca bramble, eelkek; French: piquant lou-lou (Mauritius); Other: kohkihl (Kosrae); soni, wa sori, wa ngandrongandro, wa votovotoa, (Fiji) | Rosaceae | shrub |
| Rubus rosifolius | English: roseleaf raspberry, thimbleberry, Mauritius raspberry; French: framboisier; Other: ola'a, ‘akala, akalakala (Hawai'i) | Rosaceae | shrub |
| Rubus spp. | English: raspberries, blackberries, brambles | Rosaceae | shrub |
| Ruellia brevifolia | Acanthaceae | herb | |
| Ruellia prostrata | English: black weed, bell weed; Other: vao uli, vao uliuli (Samoa) | Acanthaceae | herb |
| Saccharum spontaneum | English: wild cane, false sugarcane; French: canne à sucre fourragère, canne sauvage; Other: banga ruchel (Palau); ac (Kosrae); tebu salah; ahlek, ahlec, (Pohnpei); to aheo (French Polynesia) | Poaceae | grass |
| Sacciolepis indica | English: glenwood grass | Poaceae | grass |
| Salvinia molesta | English: salvinia, water fern, kariba weed, African payal | Salviniaceae | fern |
| Sanchezia speciosa | English: sanchezia. | Acanthaceae | shrub |
| Sansevieria trifasciata | English: bowstring hemp, mother-in-law’s tongue; French: chanvre d'Afrique; Other: tigre (Guam), kitelel (Palau) | Agavaceae | herb |
| Schinus molle | English: pepper tree, California pepper tree, Peruvian peppertree, pepperina; French: faux poivrier, molée des jardins, poivrier d'Amérique | Anacardiaceae | tree |
| Schinus terebinthifolius | English: Christmas-berry, Brazilian pepper, Brazilian holly, Florida holly; French: faux poivrier, poivre rose; Other: warui (Fiji); wilelaiki (Hawai‘i), naniohilo (Hawai‘i (Moloka‘i)) | Anacardiaceae | tree |
| Schizachyrium condensatum | English: little bluestem, bush beardgrass | Poaceae | grass |
| Senecio madagascariensis | English: fireweed | Asteraceae | herb |
| Senna obtusifolia | English: habucha, coffeeweed, sicklepod | Fabaceae | herb |
| Senna septemtrionalis | English: buttercup bush, yellow shower, laburnum; Other: mosimosi, naseni karakarawa, winivinikau (Fiji); kolomona, kalamona (Hawai'i) | Fabaceae | shrub/tree |
| Senna siamea | English: cassod tree, kassod tree, Siamese cassia; French: bois perdrix; Other: kasia (Tonga) | Fabaceae | tree |
| Sesbania punicea | English: red sesbania, coffee weed, rattle-pod, sesban, red seine bean, Brazil rattlebox, coffee of the coast, tame acacia, false poinciana, black acacia, purple sesbane | Fabaceae | shrub |
| Setaria palmifolia | English: palmgrass, short pitpit, hailans pitpit, broadleaved bristlegrass; Other: vao ‘ofe‘ofe (Samoa) | Poaceae | grass |
| Solandra maxima | English: golden cup, cup of gold, chalice vine; Spanish: copa de oro | Solanaceae | liana |
| Solanum seaforthianum | English: potato creeper, Brazilian nightshade | Solanaceae | vine |
| Solanum tampicense | English: wetland nightshade, aquatic soda apple | Solanaceae | aquatic herb |
| Solanum viarum | English: tropical soda apple | Solanaceae | herb? |
| Sporobolus elongatus | English: wiregrass, rat-tail dropseed | Poaceae | grass |
| Stapelia gigantea | English: carrion flower, starfish flower, zulu-giant, giant toad plant | Asclepiadaceae | succulent |
| Stylosanthes guianensis | English: stylo, Brazilian lucerne, tropical lucerne, Nigerian stylo | Fabaceae | herb |
| Syncarpia glomulifera | English: turpentine tree, lustre wood | Myrtaceae | tree |
| Tabebuia heterophylla | English: pink tecoma, pink trumpet tree, white cedar; Other: calice du pape | Bignoniaceae | tree |
| Terminalia myriocarpa | English: hollock, jhalna | Combretaceae | tree |
| Tetrazygia bicolor | English: Florida clover ash | Melastomataceae | shrub/tree |
| Thunbergia grandiflora | English: Bengal trumpet, blue trumpet vine, clock vine, skyvine, large-flowerd thunbergia; Other: bung el etiu (Palau) | Acanthaceae | vine |
| Thunbergia laurifolia | English: purple allamanda, laurel-leaved thunbergia, laurel clock vine | Acanthaceae | vine |
| Tibouchina herbacea | English: glorybush, cane ti, tibouchina | Melastomataceae | herb |
| Tibouchina urvilleana | English: glorybush, lasiandra, princess flower | Melastomataceae | herb |
| Timonius timon | English: liberal (Palau); Other: sakosia (from Ecoport, no source given) | Rubiaceae | tree |
| Triadica sebifera | English: Chinese tallow tree, popcorn tree, vegetable tallow, white wax berry, chicken tree, Florida aspen; French: arbre à suif, boiré | Euphorbiaceae | tree |
| Tribulus cistoides |