This table lists invasive and potentially invasive plant species profiled by the Pacific Island Ecosystems at Risk project (PIER) that occur on Johnston Atoll. 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? |
| Acacia farnesiana (Fabaceae) | Mimosa farnesiana L.; Vachellia farnesiana (L.) Wight & Arn. | shrub | No |
| Aleurites moluccana (Euphorbiaceae) | Aleurites moluccanus (L.) Willd.; Aleurites triloba Forst.; Croton moluccanus L. | tree | No |
| Amaranthus dubius (Amaranthaceae) | herb | No | |
| Amaranthus spinosus (Amaranthaceae) | herb | No | |
| Amaranthus viridis (Amaranthaceae) | Amaranthus gracilis Desf., nom. nud. | herb | No |
| Bidens pilosa (Asteraceae) | herb | No | |
| Capsicum frutescens (Solanaceae) | herb | No | |
| Casuarina equisetifolia (Casuarinaceae) | Casuarina litorea L. var. litorea; Casuarina littorea Rumph. | tree | No |
| Catharanthus roseus (Apocynaceae) | Lochnera rosea (L.) Reichb. ex Steud.; Vinca rosea L. | herb | No |
| Cenchrus echinatus (Poaceae) | grass | No | |
| Chenopodium murale (Chenopodiaceae) | herb | No | |
| Chloris barbata (Poaceae) | Chloris inflata Link; Chloris paraguayensis Steud. | grass | No |
| Citrullus lanatus (Cucurbitaceae) | Citrullus aedulis Pangalo; Citrullus vulgaris Schrad. | vine | No |
| Citrus aurantiifolia (Rutaceae) | tree | No | |
| Conyza bonariensis (Asteraceae) | Erigeron bonariense L.; Erigeron floribundus Schultz-Bip. | herb | No |
| Crinum asiaticum (Amaryllidaceae) | Crinum amabile Donn ex Ker Gawl. | herb | No |
| Crotalaria incana (Fabaceae) | shrub | 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 |
| Cynodon dactylon (Poaceae) | grass | No | |
| Cyperus rotundus (Cyperaceae) | Chlorocyperus rotundus (L.) Palla; Cyperus purpuro-variegatus Boeckeler; Cyperus stoloniferum pallidus Boeckeler; Cyperus tetrastachyos Desf.; Cyperus tuberosus Roxb | sedge | No |
| Dactyloctenium aegyptium (Poaceae) | Eleusine aegyptiaca (L.) Desf. | grass | No |
| Echinochloa crus-galli (Poaceae) | Panicum crus-galli L. | 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 |
| Eriobotrya japonica (Rosaceae) | tree | Yes | |
| Euphorbia heterophylla (Euphorbiaceae) | Euphorbia geniculata Ortega; Euphorbia prunifolia Jacq.; Poinsettia heterophylla (L.) Klotzsch & Garcke | herb | No |
| Euphorbia hirta (Euphorbiaceae) | Chamaesyce hirta (L.) Millsp. | herb | No |
| Euphorbia hypericifolia (Euphorbiaceae) | Chamaesyce glomerifera Millsp.; Chamaesyce hypericifolia (L.) Millsp.; Euphorbia glomifera Millsp. | herb | No |
| Euphorbia prostrata (Euphorbiaceae) | Chamaesyce prostrata (Aiton) Small | herb | No |
| Ficus microcarpa (Moraceae) | Ficus thonningii Blume | tree | No |
| Heliconia spp. (Heliconiaceae) | herb | No | |
| Ipomoea violacea (Convolvulaceae) | Convolvulus tuba Schlechtend.; Ipomoea macrantha Roem. & Schult.; Ipomoea tuba (Schlechtend.) G. Don | vine | No |
| Lobularia maritima (Brassicaceae) | herb | No | |
| Mangifera indica (Anacardiaceae) | tree | No | |
| Merremia tuberosa (Convolvulaceae) | Ipomoea tuberosa L. | vine | No |
| Nerium oleander (Apocynaceae) | Nerium indicum Mill. | shrub | No |
| Nicotiana glauca (Solanaceae) | tree | No | |
| Paspalum dilatatum (Poaceae) | grass | No | |
| Pedilanthus tithymaloides (Euphorbiaceae) | Euphorbia tithymaloides L. | herb | No |
| Persea americana (Lauraceae) | tree | No | |
| Pilea microphylla (Urticaceae) | herb | No | |
| Pithecellobium dulce (Fabaceae) | Mimosa dulcis Roxb. | tree | No |
| Pluchea carolinensis (Asteraceae) | Conyza carolinensis Jacq.; Pluchea symphytifolia auct. | shrub | No |
| Pluchea indica (Asteraceae) | shrub | No | |
| Portulaca oleracea (Portulacaceae) | herb | No | |
| Prosopis pallida (Fabaceae) | tree | No | |
| Ricinus communis (Euphorbiaceae) | shrub | No | |
| Sansevieria trifasciata (Asparagaceae) | herb | No | |
| Schinus terebinthifolius (Anacardiaceae) | tree | No | |
| Setaria verticillata (Poaceae) | Panicum verticillatum L.; Pennisetum verticillatum R. Br. | grass | No |
| Solanum lycopersicum (Solanaceae) | Lycopersicon esculentum Mill.; Lycopersicon lycopersicum (L.) Karst. | herb | No |
| Sonchus oleraceus (Asteraceae) | Sonchus asper sensu various authors. | herb | No |
| Stachytarpheta jamaicensis (Verbenaceae) | herb | No | |
| Tetragonia tetragonoides (Aizoaceae) | herb | No | |
| Thevetia peruviana (Apocynaceae) | Cascabela thevetia (L.) Lippold; Thevetia nerifolia Juss. ex Steud. | tree | No |
| Tribulus cistoides (Zygophyllaceae) | herb | No | |
| Waltheria indica (Malvaceae) | Waltheria americana L. | shrub | No |