Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Habit:  grass

Description:  "Loosely tufted annual; culms 30-100 cm high, erect or ascending. Leaf blades flat, up to 20 cm long, 5 mm wide. Panicle ovate, 7-30 cm long, very loose and open, the spikelets trembling on long fine pedicels, sometimes bearded in the axils. Spikelets 10-60-flowered, linear, 5-25 mm long, 1.5-2 mm wide, the lemmas closely imbricate and covering the rhachilla, purplish, breaking up from the base, the rhachilla persistent; flumes unequal, subacute, the lower narrowly ovate and 0.8-1.2 mm long, the upper ovate and 1.2-1.5 mm long; lemmas broadly ovate, 1.5-1.7 mm long, obtuse (ovate and subacute in side view); palea scabrid on the keels, persistent; anthers 2, 0.3-0.5 mm long. Caryopsis subglobose to broadly ovoid, 0.4-0.6 mm long" (Clayton et al.. 1974; pp. 236-237).

Description from GrassBase.

Habitat/ecology:  Roadsides, farmland and other weedy places, sea level to 1600 m (Clayton et al.. 1974; pp. 236-237).

Propagation:  Seed

Native range:  Tropical Africa and India (Clayton et al.. 1974; pp. 236-237).

Presence:

Pacific
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
Vanuatu New Hebrides Islands	Vanuatu (Republic of)		Swarbrick, John T. (1997) (p. 92)

Pacific Rim
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
Cambodia Cambodia	Cambodia (Kingdom of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2011)
Vietnam Vietnam	Vietnam (Socialist Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2011)

Additional information:
Additional online information about Eragrostis tremula is available from the Hawaiian Ecosystems at Risk project (HEAR).

Information about Eragrostis tremula as a weed (worldwide references) may be available from the Global Compendium of Weeds (GCW).

Taxonomic information about Eragrostis tremula may be available from the Germplasm Resources Information Network (GRIN).

References:

Clayton, W. D./Phillips, S. M./Renvoize, S. A. 1974. Gramineae (Part 2). In: Flora of tropical East Africa, R. M. Polhill, ed. Crown Agents, London.

Swarbrick, John T. 1997. Weeds of the Pacific Islands. Technical paper no. 209. South Pacific Commission, Noumea, New Caledonia. 124 pp.

U.S. Dept. Agr., Agr. Res. Serv. 2011. National Genetic Resources Program. Germplasm Resources Information Network (GRIN). Online searchable database.