This table lists invasive and potentially invasive plant species profiled by the Pacific Island Ecosystems at Risk project (PIER) that occur on Pis Island. 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 |
| Asclepias curassavica (Apocynaceae) | herb | No | |
| Cenchrus brownii (Poaceae) | grass | No | |
| Centella asiatica (Apiaceae) | Hydrocotyle asiatica 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 |
| Dioscorea bulbifera (Dioscoreaceae) | vine | No | |
| Eleusine indica (Poaceae) | grass | No | |
| Eragrostis amabilis (Poaceae) | Eragrostis tenella (L.) P. Beauv. ex Roem. & Schult. | grass | No |
| Euphorbia cyathophora (Euphorbiaceae) | herb | No | |
| Euphorbia hirta (Euphorbiaceae) | Chamaesyce hirta (L.) Millsp. | herb | No |
| Euphorbia prostrata (Euphorbiaceae) | Chamaesyce prostrata (Aiton) Small | herb | No |
| Gomphrena globosa (Amaranthaceae) | herb | No | |
| Ipomoea violacea (Convolvulaceae) | Convolvulus tuba Schlechtend.; Ipomoea macrantha Roem. & Schult.; Ipomoea tuba (Schlechtend.) G. Don | vine | No |
| Mirabilis jalapa (Nyctaginaceae) | herb | No | |
| Nicotiana tabacum (Solanaceae) | herb | No | |
| Oplismenus compositus (Poaceae) | Panicum compositum L. | grass | No |
| Paspalum conjugatum (Poaceae) | grass | No | |
| Phyllanthus amarus (Phyllanthaceae) | Phyllanthus niruri sensu various Pacific botanists. | herb | No |
| Ruellia blechum (Acanthaceae) | Barleria pyramidata Lam.; Blechum brownei Juss.; Blechum pyramidatum (Lam.) Urb. | herb | No |
| Sphagneticola trilobata (Asteraceae) | Thelechitonia trilobata (L.) H. Rob. & Cautrec.; Wedelia trilobata (L.) Hitchc. | herb | No |
| Stachytarpheta cayennensis (Verbenaceae) | Stachytarpheta dichotoma (Ruiz & Pav.) Vahl.; Stachytarpheta urticaefolia (Salisb.) Sims; Stachytarpheta urticifolia (Salisb.) Sims | herb | No |
| Tradescantia spathacea (Commelinaceae) | Rhoeo discolor Hance ex Walp.; Rhoeo spathacea (Sw.) Stearn; Tradescantia discolor L'Hér. | herb | No |
| Zoysia matrella (Poaceae) | Agrostis matrella L.; Osterdamia matrella (L.) Kuntze; Zoysia pungens Willd. | grass | No |