This table lists invasive and potentially invasive plant species profiled by the Pacific Island Ecosystems at Risk project (PIER) that occur in the Santiago Group. 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? |
| Ageratum conyzoides (Asteraceae) | herb | No | |
| Amaranthus dubius (Amaranthaceae) | herb | No | |
| Amaranthus hybridus (Amaranthaceae) | herb | No | |
| Amaranthus viridis (Amaranthaceae) | Amaranthus gracilis Desf., nom. nud. | herb | No |
| Asclepias curassavica (Apocynaceae) | herb | No | |
| Bidens pilosa (Asteraceae) | herb | No | |
| Blechum pyramidatum (Acanthaceae) | Barleria pyramidatum (Lam.) Urb.; Blechum brownei Juss.; Ruellia blechum L. | herb | No |
| Boerhavia erecta (Nyctaginaceae) | herb | No | |
| Bouteloua disticha (Poaceae) | Bouteloua pilosa (Hook. f.) Benth. ex S. Watson; Eutriana pilosa Hook. f.; Leptochloa hirta Nees ex Steud.; Polyodon distichum Kunth | grass | No |
| Capsicum frutescens (Solanaceae) | herb | No | |
| Chamaesyce hirta (Euphorbiaceae) | Euphorbia hirta L. | herb | No |
| Chamaesyce ophthalmica (Euphorbiaceae) | herb | No | |
| Chenopodium murale (Chenopodiaceae) | herb | No | |
| Chloris radiata (Poaceae) | grass | No | |
| Chloris virgata (Poaceae) | grass | No | |
| Citrus aurantium (Rutaceae) | Citrus bigarradia Loisel.; Citrus vulgaris Risso | tree | No |
| Cleome viscosa (Cleomaceae) | Polanisia viscosa DC. | herb | No |
| Commelina diffusa (Commelinaceae) | herb | No | |
| Conocarpus erectus (Combretaceae) | Terminalia erecta (L.)Baill. | shrub/tree | No |
| Conyza bonariensis (Asteraceae) | Erigeron bonariense L.; Erigeron floribundus Schultz-Bip. | herb | No |
| Coronopus didymus (Brassicaceae) | Lepidium didymum L. | herb | No |
| Cuphea carthagenensis (Lythraceae) | herb | No | |
| Cyclospermum leptophyllum (Apiaceae) | Apium ammi Urb.; Apium leptophyllum (Pers.) F. Muell. ex Benth.; Ciclospermum leptophyllum (Pers.) Sprague | herb | No |
| Datura stramonium (Solanaceae) | herb | No | |
| Desmodium incanum (Fabaceae) | Desmodium canum Schinz & Thell., nom. illeg. | shrub | No |
| Desmodium intortum (Fabaceae) | Hedysarum intortum Mill. | herb | No |
| Digitaria ciliaris (Poaceae) | Digitaria adscendens (Kunth) Henrard | grass | No |
| Digitaria horizontalis (Poaceae) | grass | No | |
| Echinochloa colona (Poaceae) | grass | No | |
| Eleusine indica (Poaceae) | grass | No | |
| Eragrostis cilianensis (Poaceae) | Eragrostis megastachya (Koel.) Lk.; Poa cilianensis All. | grass | No |
| Eragrostis ciliaris (Poaceae) | Poa ciliaris L. | grass | No |
| Galactia tenuiflora (Fabaceae) | Galactia striata (Jacq.) Urb.; Glycine tenuiflora Klein ex Willd. | vine | No |
| Gamochaeta purpurea (Asteraceae) | Gnaphalium purpureum L. | herb | No |
| Hyptis pectinata (Lamiaceae) | herb | No | |
| Hyptis rhomboidea (Lamiaceae) | Hyptis capitata var. mexicana Briq.; Hyptis capitata var. pilosa Briq.; Hyptis decurrens (Blanco) Epling | herb | No |
| Ipomoea alba (Convolvulaceae) | vine | No | |
| Ipomoea nil (Convolvulaceae) | Convolvulus nil L.; Pharbitis limbata Lindl.; Pharbitis nil (L.) Choisy | vine | No |
| Jatropha curcas (Euphorbiaceae) | shrub | No | |
| Malachra alceifolia (Malvaceae) | herb | No | |
| Malva parviflora (Malvaceae) | herb | No | |
| Malvastrum coromandelianum (Malvaceae) | Malva coromandeliana L.; Malvastrum tricuspidatum A. Gray | herb | No |
| Mentha x piperita (Lamiaceae) | Mentha citrata Ehrh. | herb | No |
| Merremia aegyptia (Convolvulaceae) | Ipomoea aegyptia L. | vine | No |
| Nicandra physalodes (Solanaceae) | herb | No | |
| Oplismenus compositus (Poaceae) | Panicum compositum L. | grass | No |
| Oplismenus hirtellus (Poaceae) | Oplismenus hirtellus subsp. setarius (Lam.) Mez ex Ekman; Oplismenus setarius (Lam.) Roem. & Schult. | grass | No |
| Oxalis corniculata (Oxalidaceae) | Oxalis repens Thunb. | herb | No |
| Paspalum conjugatum (Poaceae) | grass | No | |
| Pectis linifolia (Asteraceae) | herb | No | |
| Persea americana (Lauraceae) | tree | No | |
| Physalis angulata (Solanaceae) | Physalis lanceifolia Nees | herb | No |
| Phytolacca octandra (Phytolaccaceae) | Phytolacca icosandra L. | shrub | No |
| Plantago major (Plantaginaceae) | herb | No | |
| Porophyllum ruderale subsp. macrocephalum (Asteraceae) | Porophyllum macrocephalum DC. | herb | No |
| Portulaca oleracea (Portulacaceae) | herb | No | |
| Prosopis juliflora (Fabaceae) | tree | No | |
| Pseudelephantopus spiralis (Asteraceae) | Distreptus spiralis Less. | herb | No |
| Rivina humilis (Phytolaccaceae) | Rivina laevis L. | herb | No |
| Rubus niveus (Rosaceae) | shrub | No | |
| Sapindus saponaria (Sapindaceae) | tree | No | |
| Scoparia dulcis (Plantaginaceae) | herb | No | |
| Senna obtusifolia (Fabaceae) | Cassia obtusifolia L. | herb | No |
| Senna occidentalis (Fabaceae) | Cassia occidentalis L. | shrub | No |
| Sida acuta (Malvaceae) | herb | No | |
| Sida rhombifolia (Malvaceae) | Sida microphylla Cav. | shrub | No |
| Solanum americanum (Solanaceae) | Solanum nigrum var. americanum (Mill.) O.E. Schulz | herb | No |
| Solanum quitoense (Solanaceae) | shrub | No | |
| Soliva anthemifolia (Asteraceae) | herb | No | |
| Sonchus oleraceus (Asteraceae) | Sonchus asper sensu various authors. | herb | No |
| Sorghum arundinaceum (Poaceae) | Sorghum verticilliflorum (Steudel) Stapf | grass | No |
| Spermacoce remota (Rubiaceae) | Borreria laevis sensu various authors.; Spermacoce assurgens Ruiz & Pav. | herb | No |
| Synedrella nodiflora (Asteraceae) | herb | No | |
| Trianthema portulacastrum (Aizoaceae) | herb | No | |
| Tribulus cistoides (Zygophyllaceae) | herb | No | |
| Tribulus terrestris (Zygophyllaceae) | herb | No | |
| Verbena litoralis (Verbenaceae) | herb | No |