Pacific Island Ecosystems at Risk (PIER)

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Eragrostis pilosa
(L.) Beauv., Poaceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Other Latin names:  Eragrostis multicaulis Steud.; Poa pilosa L.

Common name(s): [more details]

Chinese: hua mei cao

English: hairy love grass, India love grass, Indian love grass, Jersey lovegrass, pilose eragrostis, small tufted lovegrass, soft lovegrass, spear grass

French: éragrostide poilue, pâturin poilu

Spanish: barba de indio, pasto ilusión, pasto pelillo, sereno

Habit:  grass

Description:  "Loosely tufted annual up to 70 cm tall; culms erect or ascending.  Leaf sheaths glabrous; leaf blades linear, flat, attenuate, up to 20 cm x 0.4 cm, glabrous. Panicles open, elliptic to ovate, 4-25 cm long, lowest branches whorled except in smallest panicles, capillary, usually with a few long white hairs in axils; spikelets purplish green, linear-ovate, ca 0.5 mm long, nerveless, upper ovate, acute, 1-1.5 mm long, 1-nerved; lemmas broadly ovate, blunt to subacute, 1.3-2 mm long, obscurely 3-nerved, minutely scabrid along keel" (Stanley & Ross, 1989; vol. 3, p. 169).

"Annual, tufted, culms slender, up to 1 m high; leaf-blades relatively short and narrow, up to 3 mm broad; panicle delicate, open, 5-20 cm long, grayish, branches spreading or ascending; spikelets dark, 4-10 flowered, about 6 mm long; glumes and lemmas 3-nerved"  (Stone, 1970; p. 191).

Description from GrassBase.

Habitat/ecology:  "Although it prefers moist pastures and open, disturbed ground, it also frequents roadsides and waste places that are often seasonally dry and only infrequently disturbed.  It may appear at altitudes of 500 to 3200 m"  (Holm et al., 1997; p. 347).

In Hawai‘i, "adventive in arid, disturbed sites" (Wagner et al., 1999; pp. 1538, 1908).  In Fiji, "from sea level to about 800 m, sprawling or in dense clumps on hillsides, in swamps, on cultivated land, and along roadsides"  (Smith, 1979; p 301). "Naturalized sparingly in Guam" (Stone, 1970; p. 191). In American Samoa and Samoa, "uncommon in disturbed places" (Whistler, 1988; p. 52).

Propagation:  Seed.  "Water, wind, and soil movement are the most likely dispersal agents, with help from man.  It spreads with hay movement and perhaps in crop seed." Also spread by machinery and road and railroad traffic (Holm et al., 1997; p. 348).

Native range:  Southern Europe and most tropical and subtropical parts of the Old World (Stone, 1970; p. 191).

Presence:

Pacific
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
American Samoa
Manu‘a Islands
Ofu Island   Whistler, W. A. (1990)
Voucher cited: Whistler 3051
American Samoa
Tutuila Islands
Tutuila Island   Whistler, W. A. (1988) (p. 52)
As E. multicaulis. Voucher cited: Lamoureux 3065
Federated States of Micronesia
Chuuk Islands
Weno (Moen) Island introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 42)
Federated States of Micronesia
Pohnpei Islands
Pohnpei Island introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 42)
Federated States of Micronesia
Pohnpei Islands
Pohnpei Island introduced
invasive
Herrera, Katherine/Lorence, David H./Flynn, Timothy/Balick, Michael J. (2010) (p. 57)
Naturalized
Fiji
Fiji Islands
Viti Levu Island introduced
invasive
Smith, Albert C. (1979) (p. 301)
Vouchers cited: Greenwood 2, DA 8220, DA 8203, DA 2835, Greenwood 1175, DA 7967, DA 10168, DA 7915, DA 2832, DA 4005, Billespie 3572, C.R. Turbet 40, DA 9092
Guam
Guam Island
Guam Island introduced
invasive
Stone, Benjamin C. (1970) (p. 191)
Sparingly naturalized.
Guam
Guam Island
Guam Island introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 42)
State of Hawaii
Hawaiian Islands
Kaua‘i Island introduced
invasive
Lorence, David H./Flynn, Timothy W./Wagner, Warren L. (1995) (pp. 45-46)
Vouchers cited: T. Flynn 630 (BISH, PTBG), D. Lorence & P. O'Connor 5761 (BISH, PTBG)
State of Hawaii
Hawaiian Islands
Lāna‘i Island introduced
invasive
Herbst, Derral R./Clayton, W. D. (1998) (pp. 27-28)
Voucher cited: Munro 466 (BISH)
State of Hawaii
Hawaiian Islands
O‘ahu Island introduced
invasive
Snow, Neil/Lau, Alex (2010) (p. 51)
Voucher cited: O. & I. Degener 25648 (BISH)
Japan (offshore islands)
Ogasawara (Bonin) Islands
Bonin (Ogasawara) Islands introduced
Kato, Hidetoshi (2007)
Kiribati
Line Islands
Kiritimati (Christmas) Atoll introduced
invasive
Wester, Lyndon (1985) (p. 16)
New Caledonia
New Caledonia
New Caledonia Islands   Swarbrick, John T. (1997) (p. 92)
Palau
Palau (Belau ) (main island group)
Babeldaob Island   Beleu National Museum (Republic of Palau. Koror.) (1982) (voucher ID: BNM 3174)
Taxon name on voucher: Eragrostis pilosa
Palau
Palau (Belau ) (main island group)
Koror (Oreor) Island introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 42)
Papua New Guinea
Papua New Guinea (eastern New Guinea Island)
Papua New Guinea (eastern New Guinea Island)   Henty, E. E. (1969) (p. 93)
A common weed of cultivation and roadsides.
Papua New Guinea
Papua New Guinea (eastern New Guinea Island)
Papua New Guinea (eastern New Guinea Island)   Holm, Leroy/Doll, Jerry/Holm, Eric/Pancho, Jaun/Herberger, James (1997) (p. 345)
Philippines
Philippine Islands
Philippine Islands introduced
invasive
Merrill, Elmer D. (1925) (p. 90)
A weed in open waste places, of recent introduction, but now locally abundants.
Philippines
Philippine Islands
Philippine Islands   Holm, Leroy/Doll, Jerry/Holm, Eric/Pancho, Jaun/Herberger, James (1997) (p. 345)
Samoa
Western Samoa Islands
Upolu Island   Whistler, W. A. (1988) (p. 52)
As E. multicaulis. Voucher cited: Whistler 2073
Solomon Islands
Solomon Islands
Solomon Islands introduced
Hancock, I. R./Henderson, C. P. (1988) (p. 71)
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) introduced
invasive
National Herbarium of New South Wales (2013)
Victoria
Naturalised
Australia
Australia (continental)
New South Wales introduced
invasive
National Herbarium of New South Wales (2013)
Naturalised
Australia
Australia (continental)
Northern Territory introduced
invasive
National Herbarium of New South Wales (2013)
Naturalised
Australia
Australia (continental)
Queensland introduced
invasive
National Herbarium of New South Wales (2013)
Naturalised
Cambodia
Cambodia
Cambodia (Kingdom of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Canada (British Colombia)
Province of British Columbia
Canada (British Columbia) introduced
U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)
Central America
Central America (Pacific rim)
El Salvador (Republic of) introduced
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Naturalized
Central America
Central America (Pacific rim)
Guatemala (Republic of) introduced
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Naturalized
Central America
Central America (Pacific rim)
Honduras (Republic of) introduced
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Naturalized
China
China
China (People's Republic of) native
Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)
Open grasslands. Anhui, Beijing, Fujian, Guizhou, Hainan, Heilongjiang, Henan, Hubei, Nei Mongol, Ningxia, Shaanxi, Shandong, Xizang, Yunnan, Zhejiang.
China
China
Hong Kong native
Wu, Te-lin (2001) (p. 335)
var. imberbis Franch. Along roadside, in field and grassland.
Indonesia
Indonesia
Indonesia (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Japan
Japan
Japan (country) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Japan
Japan
Japan (country) introduced
Mito, Toshikazu/Uesugi, Tetsuro (2004) (p. 192)
North Korea
North Korea
North Korea (Democratic People's Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
South Korea
South Korea
South Korea (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Malaysia
Malaysia
Malaysia (country of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Mexico
Mexico
Mexico (United Mexican States) introduced
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Naturalized
Singapore
Singapore
Singapore (Republic of) uncertain if introduced
invasive
Chong, Kwek Yan/Tan, Hugh T. W./Corlett, Richard T. (2009) (p. 39)
Weed of uncertain origin
South America (Pacific rim)
South America (Pacific rim)
Chile (Republic of) introduced
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Naturalized
South America (Pacific rim)
South America (Pacific rim)
Colombia (Republic of) introduced
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Naturalized
South America (Pacific rim)
South America (Pacific rim)
Perú (Republic of) introduced
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Naturalized
Taiwan
Taiwan Island
Taiwan Island native
Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)
Open grasslands.
Thailand
Thailand
Thailand (Kingdom of)   Holm, Leroy/Pancho, Juan V./Herberger, James P./Plucknett, Donald L. (1979) (p. 145)
United States (west coast)
United States (west coast states)
USA (Oregon) introduced
U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)
United States (west coast)
United States (west coast states)
USA (California) introduced
U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)
United States (west coast)
United States (west coast states)
USA (Washington) introduced
U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)
Vietnam
Vietnam
Vietnam (Socialist Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Indian Ocean
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Australia (Indian Ocean offshore islands)
Christmas Island Group
Christmas Island introduced
invasive
Swarbrick, J. T. (1997) (p. 113)
Also reported from
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Canada (except British Colombia)
Canada
Canada (country) introduced
U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)
United States (continental except west coast)
United States (other states)
United States (other states) introduced
U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)
United States (continental except west coast)
United States (other states)
USA (Florida) introduced
U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)


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This page was created on 26 JUL 2002 and was last updated on 30 NOV 2008.