Pacific Island Ecosystems at Risk (PIER)

Report on invasive plant species in Palau (2002 survey)

Appendix 5.  Other invasive species by location

Table 6.   Other invasive species present on the Rock Islands

Scientific name

Common Names (abridged)

Family

Habit

Locations
**†Achyranthes aspera chaff-flower, devil's horsewhip; prickly chaff-flower, louch beluu (Palau), louch el beluu (Palau) Amaranthaceae herb Ngeanges
Ageratum conyzoides billygoat-weed, chick week, goatweed, whiteweed, ngmak (Palau) Asteraceae herb Ngchus
†Alysicarpus vaginalis alyce-clover, buffalo-clover, one-leaf-clover Fabaceae herb Aulupse‘el
Amaranthus viridis green amaranth, pigweed, slender amaranth Amaranthaceae herb Ngercheu (Carp Resort)
*Annona muricata soursop, prickly custard apple, sausab (Palau) Annonaceae tree Ngchus
†Averrhoa bilimbi bilimbi, cucumber tree, tree cucumber, tree sorrel Oxalidaceae tree Aulupse‘el
†Chamaesyce hirta asthma plant, garden spurge, pill-bearing spurge, hairy spurge, udall (Palau) Euphorbiaceae herb Urukthapel, Ngeanges, Ngerchong
Chamaesyce prostrata creeping splurge, prostrate spurge, red caustic creeper Euphorbiaceae herb Ngchus
Conyza canadensis butterweed, Canadian horseweed, Canadian fleabane, hogweed, horseweed Asteraceae herb Ngercheu (Carp Resort), Ngerchong
†Crassocephalum crepidoides thickhead, fireweed, redflower ragleaf Asteraceae herb Urukthapel
†Dioscorea bulbifera aerial yam, air-potato, bitter yam, cheeky yam, potato yam, belloi (Palau) Dioscoreaceae vine Aulupse‘el
*Duranta erecta duranta, golden dewdrop, pigeon-berry, sky-flower Verbenaceae shrub Ngercheu (Carp Resort)
†Echinochloa colona awnless barnyard grass (Australia), corn panic grass, Deccan grass, jungle ricegrass, jungle rice, millet-rice, pigeon millet Poaceae grass Aulupse‘el
†Emilia sonchifolia Cupid's shaving-brush, emilia, Flora's paint brush, purple sow thistle, sow thistle Asteraceae herb Aulupse‘el
*Eragrostis amabilis Bug's egg grass, Japanese love grass, ouemoket (Palau) Poaceae grass Bablomekang, Mecherchar (Eil Malk), Ngeanges
Euphorbia cyathophora dwarf poinsettia, fire-on-the-mountain, Mexican fire plant, painted spurge, wild poinsettia Euphorbiaceae herb Ngercheu (Carp Resort)
*Gomphrena globosa bachelor's-button, bozu, globe amaranth, pearly everlasting, botang (Palau) Amaranthaceae herb Ngercheu (Carp Resort)
**†Hemigraphis reptans Acanthaceae herb Aulupse‘el, Urukthapel
Hippobroma longiflora star of Bethlehem, udel ra badrei (Palau) Campanulaceae herb Bkul a Chesemiich, Ngerchong
†Imperata conferta plume grass Poaceae grass Aulupse‘el
*Momordica charantia balsam-apple, bitter-melon, bitter gourd, balsam pear, squirting cucumber, cerasee, peria, markoso (Palau), markosong (Palau) Cucurbitaceae vine Ngercheu (Carp Resort)
*Opuntia sp. drooping tree pear, prickly pear Cactaceae cactus Ngercheu (Carp Resort)
Phyllanthus amarus ukalla ruchel (Palau) Euphorbiaceae herb Bkul a Chesemiich, Ngercheu (Carp Resort), Ngerchong
Pilea microphylla artillery plant, gunpowder plant, pistol plant, rockweed Urticaceae herb Ngercheu (Carp Resort), Ngerchong, Urukthapel
Portulaca oleracea pigweed, purslane Portulacaceae herb Ngercheu (Carp Resort)
Sida rhombifolia arrow-leaf sida, Cuban jute, Paddy's lucerne, Queensland-hemp, teaweed, keak (Palau) Malvaceae shrub Ngerchong
Spermacoce assurgens buttonweed, okulabeluu (Palau) Rubiaceae herb Ngercheu (Carp Resort), Ngchus
†Stachytarpheta jamaicensis bastard vervain, blue porterweed, Brazilian tea, Jamaica vervain, joee, light blue snakeweed, louch beluu (Palau) Verbenaceae herb Aulupse‘el
Stenotaphrum secundatum buffalo grass, St. Augustine grass Poaceae grass Ngerchong

*Cultivated
**Native/Micronesian introduction
†Reported present by Fosberg et al. (1979)

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This page revised 7 April 2009