Pacific Island Ecosystems at Risk (PIER)

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Sporobolus elongatus
R.Br., Poaceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Common name(s): [more details]

English: rat-tail dropseed, wire grass

Habit:  grass

Description:  "Tufted perennial [grass], with erect glabrous culms up to 90 cm high.  Sheaths glabrous; blades flat or somewhat involute, 10-20 cm long, 3-6 mm wide.  Panicle spikelike, up to 30 cm long or more, dull lead-colored, the lower branches appressed, the upper ones ascending, densely contracted.  Spikelets about 1/32-1/16 in long, densely crowded.  Lower glume 1/4 as long as floret; upper glume 1/2 as long as floret.  Lemma and palea equal.  Seed reddish-brown"  (Stone, 1970; p. 193).

Description from GrassBase.

Habitat/ecology:  In Fiji, "from sea level to about 600 m along roadsides and in waste places, on open hillsides, along riverbanks, and in plantations and cultivated fields".  A weed that is difficult to eradicate (Smith, 1979; pp. 308-309).

Propagation:  Seed

Native range:  Australia and Indo-Malesia into Polynesia (Smith, 1979; pp. 308-309).

Presence:

Pacific
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Fiji
Fiji Islands
Lakemba Island native
Smith, Albert C. (1979) (pp. 308-309)
Fiji
Fiji Islands
Matuku Island native
Smith, Albert C. (1979) (pp. 308-309)
Fiji
Fiji Islands
Ovalau Island native
Smith, Albert C. (1979) (pp. 308-309)
Vouchers cited: DA 1346, DA 1364
Fiji
Fiji Islands
Taveuni Island native
Smith, Albert C. (1979) (pp. 308-309)
Vouchers cited: DA 8894, DA 8915, DA 5737
Fiji
Fiji Islands
Vanua Levu Island native
Smith, Albert C. (1979) (pp. 308-309)
Vouchers cited: DA 5702, DA 8953
Fiji
Fiji Islands
Vanua Mbalavu Island native
Smith, Albert C. (1979) (pp. 308-309)
Voucher cited: DA 10235
Fiji
Fiji Islands
Viti Levu Island native
Smith, Albert C. (1979) (pp. 308-309)
Vouchers cited: DA 9796, DA 8172, DA 8150, DA 9033, DA 7988, DA 8045, DA 7704
Guam
Guam Island
Guam Island introduced
invasive
Stone, Benjamin C. (1970) (p. 193)
Voucher cited: Necker 401
State of Hawaii
Hawaiian Islands
Hawai‘i (Big) Island introduced
invasive
Snow, Neil (2008) (p. 41)
Voucher cited: E. J. Funk s.n. (BISH 614547)
State of Hawaii
Hawaiian Islands
Lāna‘i Island introduced
invasive
Herbst, Derral R./Clayton, W. D. (1998) (p. 36)
Present status unknown. Voucher cited: Munro 706 (BISH)
State of Hawaii
Hawaiian Islands
Maui Island introduced
Wester, Lyndon (1992) (p. 123)
State of Hawaii
Hawaiian Islands
O‘ahu Island introduced
invasive
Snow, Neil (2008) (p. 41)
Voucher cited: B. C. Stone 1234 (BISH)
New Caledonia
New Caledonia
New Caledonia Islands   Swarbrick, John T. (1997) (p. 97)
Papua New Guinea
Papua New Guinea (eastern New Guinea Island)
Papua New Guinea (eastern New Guinea Island)   Henty, E. E. (1969) (p. 180)
Collections identified as this species.
Pitcairn Islands
Pitcairn Islands
Pitcairn Island introduced
St. John, H. (1987) (p. 24)
Voucher cited: Fosberg & B. Christian 11179
Solomon Islands
Solomon Islands
Russell (Pavuvu) Island   Burcham, L. T. (1948) (p. 425)
Pavuvu Island. Voucher cited: Burcham 187 (US)
Solomon Islands
Solomon Islands
Solomon Islands   Swarbrick, John T. (1997) (p. 97)
Solomon Islands
Solomon Islands
Solomon Islands native
Hancock, I. R./Henderson, C. P. (1988) (p. 110)
Vanuatu
New Hebrides Islands
Vanuatu (Republic of)   Swarbrick, John T. (1997) (p. 97)
Pacific Rim
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Australia
Australia (continental)
Australia (continental) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
New Zealand
New Zealand
New Zealand (country) introduced
invasive
Edgar, E./Connor, H. (2000) (p. 532)
"Rough pasture and on roadside".


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This page was created on 1 JAN 1999 and was last updated on 30 NOV 2008.