Plant Threats to Pacific Ecosystems: Rock Islands

PIER plant species present in the Rock Islands listed by scientific name

A product of the Pacific Island Ecosystems at Risk project (PIER)

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This table lists invasive and potentially invasive plant species profiled by the Pacific Island Ecosystems at Risk project (PIER) that occur in the Rock Islands. It includes those of environmental concern (including those that are probably of threat only to islands with high elevations) as well as agricultural and ruderal weeds.  Each species is linked by its scientific name to an individual write-up containing relevant information.

The information in this table is based on the supporting data and may not represent the current situation. Note also there may be discrepancies among data presented at geographic resolutions (e.g., island vs. island group vs. country-territory-state levels), depending upon the reliability of the data at each level.

Species are listed in alphabetic order.  You can browse this list or use the "find" function on your web browser to search by scientific name.

Can't find it here?  Check the list of synonyms for other names (the more common synonyms are included below) or search other lists and databases available on the Internet.

Stumped by botanical terms?  Here are links to a brief glossary and a search engine for botanical terms.

Scientific name (+Family) Often-used other Latin names Habit Primarily a threat
at high elevations?
Achyranthes aspera   (Amaranthaceae) Achyranthes canescens R. Br. herb No
Ageratum conyzoides   (Asteraceae)   herb No
Alocasia macrorrhizos   (Araceae) Alocasia indica Schott; Alocasia plumbea Van Houtte; Arum indicum Lour.; Arum macrorrhizon L.; Colocasia indica (Lour.) Kunth herb No
Alysicarpus vaginalis   (Fabaceae)   herb No
Annona muricata   (Annonaceae)   tree No
Averrhoa bilimbi   (Oxalidaceae)   tree No
Basella alba   (Basellaceae) Basella cordifolia Lam.; Basella rubra L. herb No
Bidens alba   (Asteraceae) Bidens pilosa L. var. radiata Shultz-Bip. herb No
Bothriochloa bladhii   (Poaceae) Andropogon bladhii Retz.; Andropogon intermedius R. Br.; Bothriochloa caucasica (Trin.) C.E. Hubbard; Dichanthium bladhii (Retz.) Clayton grass No
Caesalpinia bonduc   (Fabaceae)   vine No
Casuarina equisetifolia   (Casuarinaceae) Casuarina litorea L. var. litorea; Casuarina littorea Rumph. tree No
Chamaesyce hirta   (Euphorbiaceae) Euphorbia hirta L. herb No
Chamaesyce prostrata   (Euphorbiaceae) Euphorbia prostrata Aiton herb No
Chamaesyce thymifolia   (Euphorbiaceae) Euphorbia rubicunda Steud.; Euphorbia thymifolia L. herb No
Cheilocostus speciosus   (Costaceae) Banksea speciosa J. Koenig; Costus sericeus Bl.; Costus speciosus (J. Koenig) Sm. herb No
Chromolaena odorata   (Asteraceae) Eupatorium odoratum L. shrub No
Cinnamomum verum   (Lauraceae) Cinnamomum zeylanicum Bl. tree No
Clerodendrum buchananii var. fallax   (Lamiaceae) Clerodendrum speciosissimum van Geert ex Morren (although there is disagreement as to whether or not these species are synonymous per Smith, 1985). shrub No
Conyza canadensis   (Asteraceae) Erigeron canadensis L. herb No
Crinum asiaticum   (Amaryllidaceae) Crinum amabile Donn ex Ker Gawl. herb No
Cyanthillium cinereum   (Asteraceae) Blumea chinensis (L.) DC.; Conyza chinensis L.; Conyza cinerea L.; Senecioides cinerea (L.) Kuntze ex Britt. & Wilson; Serratula cinerea (L.) Roxb.; Vernonia cinerea (L.) Less.; Vernonia cinerea var. parviflora (Reinw.) DC. herb No
Cyperus cyperinus   (Cyperaceae) Mariscus cyperinus (Retz.) Vahl sedge No
Digitaria ciliaris   (Poaceae) Digitaria adscendens (Kunth) Henrard grass No
Dioscorea bulbifera   (Dioscoreaceae)   vine No
Echinochloa colona   (Poaceae)   grass No
Eleusine indica   (Poaceae)   grass No
Emilia sonchifolia   (Asteraceae) Emilia javanica (Burm. f.) C. B. Rob. herb No
Eragrostis amabilis   (Poaceae) Eragrostis tenella (L.) P. Beauv. ex Roem. & Schult. grass No
Erigeron bellioides   (Asteraceae)   herb No
Ficus benjamina   (Moraceae)   tree No
Ficus microcarpa   (Moraceae) Ficus thonningii Blume tree No
Flacourtia rukam   (Salicaceae)   tree No
Hemigraphis reptans   (Acanthaceae)   herb No
Hippobroma longiflora   (Campanulaceae) Isotoma longiflora (L.) C. Presl; Laurentia longiflora (L.) Endl. herb No
Imperata conferta   (Poaceae)   grass No
Ipomoea violacea   (Convolvulaceae) Convolvulus tuba Schlechtend.; Ipomoea macrantha Roem. & Schult.; Ipomoea tuba (Schlechtend.) G. Don vine No
Ischaemum polystachyum   (Poaceae) Ischaemum digitatum var. polystachyum ((presl) Hackel grass No
Lepidium virginicum   (Brassicaceae)   herb No
Leucaena leucocephala   (Fabaceae) Leucaena glauca (L. ex Willd.) Benth. tree No
Paspalum conjugatum   (Poaceae)   grass No
Paspalum scrobiculatum   (Poaceae) Paspalum cartilagineum Presl.?; Paspalum orbiculare G. Forst. grass No
Phyllanthus amarus   (Phyllanthaceae) Phyllanthus niruri sensu various Pacific botanists. herb No
Pilea microphylla   (Urticaceae)   herb No
Polygala paniculata   (Polygalaceae)   herb No
Psidium guajava   (Myrtaceae)   tree No
Sesbania grandiflora   (Fabaceae) Agati grandiflora Desv. tree No
Sida rhombifolia   (Malvaceae) Sida microphylla Cav. shrub No
Spermacoce ovalifolia   (Rubiaceae) Borreria ovalifolia M. Martens & Galeotti; Spermacoce ernstii Fosberg & D. Powell herb No
Spermacoce remota   (Rubiaceae) Borreria laevis sensu various authors.; Spermacoce assurgens Ruiz & Pav. herb No
Sporobolus diander   (Poaceae) Sporobolus diandrus (Retz.) P. Beauv.; Sporobolus indicus (L.) R. Br. var. flaccidus (Roem. & Schult.) Veldkamp grass No
Sporobolus indicus   (Poaceae) Agrostis indica L.; Axonopus poiretii Roem. & Schult.; Sporobolus fertilis (Steud.) Clayton [= Sporobolus indicus var. major]; Sporobolus poiretii (Roem. & Schult.) Hitchc. grass No
Stachytarpheta cayennensis   (Verbenaceae) Stachytarpheta dichotoma (Ruiz & Pav.) Vahl.; Stachytarpheta urticaefolia (Salisb.) Sims; Stachytarpheta urticifolia (Salisb.) Sims herb No
Stachytarpheta jamaicensis   (Verbenaceae)   herb No
Stenotaphrum secundatum   (Poaceae)   grass No
Syzygium cumini   (Myrtaceae) Eugenia cumini (L.) Druce tree No
Tecoma stans   (Bignoniaceae) Bignonia stans L.; Stenolobium stans Seem. tree No
Timonius timon   (Rubiaceae)   tree No
Turnera ulmifolia   (Passifloraceae)   herb No

Need more info?  Have questions?  Comments?  Information to contribute?  Contact PIER! (pier@hear.org)

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This page was last regenerated on 24AUG2011.