This table lists invasive and potentially invasive plant species profiled by the Pacific Island Ecosystems at Risk project (PIER) that occur on Alamagan 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? |
| Abrus precatorius (Fabaceae) | Glycine abrus L. | vine | No |
| Acalypha indica (Euphorbiaceae) | herb | No | |
| Ageratum conyzoides (Asteraceae) | herb | No | |
| Alocasia macrorrhizos (Araceae) | Alocasia indica (Lour.) Spach; Alocasia plumbea Van Houtte; Arum indicum Lour.; Arum macrorrhizon L.; Colocasia indica (Lour.) Kunth | herb | No |
| Amaranthus dubius (Amaranthaceae) | herb | No | |
| Amaranthus spinosus (Amaranthaceae) | herb | No | |
| Amaranthus viridis (Amaranthaceae) | Amaranthus gracilis Desf., nom. nud. | herb | No |
| Angiopteris evecta (Marattiaceae) | Polypodium evectum G. Forst. | fern | No |
| Annona reticulata (Annonaceae) | Annona lutescens Saff. | tree | No |
| Annona squamosa (Annonaceae) | Annona asiatica L. | tree | No |
| Cajanus scarabaeoides (Fabaceae) | Atylosia scarabaeoides (L.) Benth.; Cantharospermum scarabaeoides (L.) Baill. | vine | No |
| Cannabis sativa (Cannabaceae) | Cannabis indica Lam. [= Cannabis sativa subsp. indica]; Cannabis ruderalis Janisch.; Cannabis sativa subsp. indica; Cannabis sativa subsp. sativa | herb | No |
| Capsicum frutescens (Solanaceae) | herb | No | |
| Casuarina equisetifolia (Casuarinaceae) | Casuarina litorea L. ex Fosberg & Sachet | tree | No |
| Catharanthus roseus (Apocynaceae) | Lochnera rosea (L.) Reichb. ex Steud.; Vinca rosea L. | herb | No |
| Cenchrus brownii (Poaceae) | Cenchrus inflexus R. Br.; Cenchrus viridis Spreng. | grass | No |
| Cenchrus echinatus (Poaceae) | grass | No | |
| Centella asiatica (Apiaceae) | Hydrocotyle asiatica L.; Hydrocotyle erecta L. f. | herb | No |
| Chloris barbata (Poaceae) | Chloris inflata Link; Chloris paraguayensis Steud. | grass | No |
| Chrysopogon aciculatus (Poaceae) | Andropogon acicularis Retz. ex Roem. & Schult.; Andropogon aciculatus Retz.; Rhaphis acicularis (Retz. ex Roem. & Schult.) Desv.; Rhaphis aciculata (Retz.) Honda | grass | No |
| Citrus aurantiifolia (Rutaceae) | Citrus acida Roxb.; Citrus lima Lunan; Limonia aurantiifolia Christm. | tree | No |
| Cleome viscosa (Cleomaceae) | Arivela viscosa (L.) Raf.; Polanisia viscosa DC. | herb | No |
| Clitoria ternatea (Fabaceae) | Clitoria albiflora Mattei; Clitoria bracteata Poir.; Clitoria mearnsii De Wild. | vine | No |
| Colocasia esculenta (Araceae) | Arum esculentum L.; Caladium esculentum (L.) Vent.; Colocasia antiquorum Schott | herb | No |
| Commelina benghalensis (Commelinaceae) | herb | No | |
| Crinum asiaticum (Amaryllidaceae) | Crinum amabile Donn ex Ker Gawl. | herb | No |
| Crotalaria pallida (Fabaceae) | Crotalaria brownei Bertero ex DC.; Crotalaria mucronata Desv.; Crotalaria striata DC. | 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 compressus (Cyperaceae) | sedge | No | |
| Cyperus cyperinus (Cyperaceae) | Kyllinga cyperina Retz.; Mariscus cyperinus (Retz.) Vahl | sedge | No |
| Cyperus cyperoides (Cyperaceae) | Kyllinga sumatrensis Retz.; Mariscus sumatrensis (Retz.) J. Raynal; Mariscus umbellatus Vahl; Scirpus cyperoides L. | sedge | No |
| Dactyloctenium aegyptium (Poaceae) | Cynosurus aegyptius L.; Eleusine aegyptiaca (L.) Desf. | grass | No |
| Desmodium heterophyllum (Fabaceae) | Hedysarum heterophyllum Willd.; Meibomia heterophylla (Willd.) Kuntze | herb | No |
| Desmodium incanum (Fabaceae) | Desmodium canum (J. F. Gmel.) Schinz & Thell.; Meibomia cana (J. F. Gmel.) S. F. Blake | shrub | No |
| Desmodium triflorum (Fabaceae) | Meibomia triflora (L.) Kuntze | herb | No |
| Eclipta prostrata (Asteraceae) | Eclipta alba (L.) Hassk.; Eclipta erecta L.; Eclipta punctata L.; Verbesina alba L.; Verbesina prostrata L. | herb | No |
| Elephantopus mollis (Asteraceae) | herb | No | |
| Eleusine indica (Poaceae) | Cynosurus indicus L.; Eleusine japonica Steud. | grass | No |
| Emilia sonchifolia (Asteraceae) | Emilia javanica (Burm. f.) C. B. Rob. | herb | No |
| Eragrostis amabilis (Poaceae) | Eragrostis plumosa (Retz.) Link; Eragrostis tenella (L.) P. Beauv. ex Roem. & Schult.; Poa tenella L. | grass | No |
| Euphorbia hirta (Euphorbiaceae) | Chamaesyce hirta (L.) Millsp.; Euphorbia pilulifera L. | herb | No |
| Euphorbia thymifolia (Euphorbiaceae) | Chamaesyce thymifolia (L.) Millsp.; Euphorbia microphylla Lam. | herb | No |
| Hyptis pectinata (Lamiaceae) | Mesosphaerum pectinatum (L.) Kuntze; Nepeta pectinata L. | herb | No |
| Ipomoea batatas (Convolvulaceae) | Convolvulus batatas L. | vine | No |
| Ipomoea indica (Convolvulaceae) | Convolvulus indicus Burm.; Ipomoea acuminata (Vahl) Roem. & Schult.; Ipomoea cathartica Poir.; Ipomoea learii Paxton; Ipomoea versicolor Meisn. | vine | No |
| Jatropha gossypiifolia (Euphorbiaceae) | Jatropha staphysagrifolia Mill. | shrub | No |
| Kyllinga nemoralis (Cyperaceae) | Cyperus kyllingia Endl.; Kyllinga monocephala Rottb. | sedge | No |
| Lablab purpureus (Fabaceae) | Dolichos lablab L.; Dolichos purpureus L.; Lablab vulgaris Savi | vine | No |
| Lawsonia inermis (Lythraceae) | Lawsonia alba Lam. | shrub/tree | No |
| Lindernia crustacea (Linderniaceae) | Capraria crustacea L.; Vandellia crustacea (L.) Benth. | herb | No |
| Malvastrum coromandelianum (Malvaceae) | Malva coromandeliana L.; Malvastrum tricuspidatum A. Gray | herb | No |
| Mangifera indica (Anacardiaceae) | tree | No | |
| Nicotiana tabacum (Solanaceae) | herb | No | |
| Oldenlandia corymbosa (Rubiaceae) | Hedyotis corymbosa (L.) Lam. | herb | No |
| Operculina ventricosa (Convolvulaceae) | Operculina turpethum (L.) Silva Manso var. ventricosa (Bertero) Austin & Staples | vine | No |
| Oplismenus compositus (Poaceae) | Panicum compositum L. | grass | No |
| Oxalis corniculata (Oxalidaceae) | Oxalis repens Thunb. | herb | No |
| Paspalum conjugatum (Poaceae) | grass | No | |
| Paspalum scrobiculatum (Poaceae) | Paspalum cartilagineum Presl.; Paspalum orbiculare G. Forst. | grass | No |
| Passiflora foetida (Passifloraceae) | vine | No | |
| Phyllanthus amarus (Phyllanthaceae) | Phyllanthus niruri sensu various Pacific botanists | herb | No |
| Physalis minima (Solanaceae) | Physalis lagascae R. & S. | herb | No |
| Pithecellobium dulce (Fabaceae) | Mimosa dulcis Roxb. | tree | No |
| Pityrogramma calomelanos (Pteridaceae) | Acrostichum calomelanos L.; Gymnogramma calomelanos var. aureoflava Hook.; Gymnogramma ochracea C. Presl; Pityrogramma austroamericana Domin | fern | No |
| Portulaca oleracea (Portulacaceae) | herb | No | |
| Ricinus communis (Euphorbiaceae) | shrub | No | |
| Ruellia blechum (Acanthaceae) | Barleria pyramidata Lam.; Blechum brownei Juss.; Blechum pyramidatum (Lam.) Urb.; Ruellia blechum f. puberulum | herb | No |
| Senna occidentalis (Fabaceae) | Cassia occidentalis L. | shrub | No |
| Senna sophera (Fabaceae) | Cassia sophera L. | shrub | No |
| Setaria pumila (Poaceae) | Setaria glauca auct.; Setaria lutescens (Stuntz) F. T. Hubb.; Setaria pallidefusca (Schumach.) Stapf & C. E. Hubb.; Setaria pumila subsp. pallidefusca; Setaria pumila subsp. pumila | grass | No |
| Sida acuta (Malvaceae) | herb | No | |
| Sida rhombifolia (Malvaceae) | Sida microphylla Cav. | shrub | No |
| Sida spinosa (Malvaceae) | herb | No | |
| Stictocardia tiliifolia (Convolvulaceae) | vine | No | |
| Synedrella nodiflora (Asteraceae) | herb | No | |
| Trema orientalis (Cannabaceae) | Trema cannabina Lour.; Trema cannabinum Lour.; Trema orientale (L.) Blume; Trema tomentosum (Roxb.) H. Hara | tree | No |
| Triumfetta semitriloba (Malvaceae) | shrub | No | |
| Urena lobata (Malvaceae) | Urena sinuata L. | shrub | No |
| Xanthosoma sagittifolium (Araceae) | Arum sagittifolium L.; Caladium sagittifolium (L.) Vent. | herb | No |
| Zoysia matrella (Poaceae) | Agrostis matrella L.; Osterdamia matrella (L.) Kuntze; Zoysia pungens Willd. | grass | No |