Pacific Island Ecosystems at Risk (PIER)

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Tripsacum laxum
Nash, Poaceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Other Latin names:  Tripsacum fasciculatum Trin. ex Asch.

Common name(s): [more details]

English: Guatemala grass

French: herbe de Guatemala

Spanish: Janeiro, pasto Guatemala

Habit:  grass

Description:  "Perennial; culms coarse, erect, commonly 2-3 meters high, branching from the upper nodes; sheaths glabrous; blades 2-6 cm wide, somewhat cordate, the margins scabrous; racemes usually solitary or in pairs, sometimes more in the terminal inflorescence; staminate spikelets about 8 mm long, the primary one of each pair sessile, the secondary pedicellate, the pedicel flattened, rather broad, about 2 mm long; pistillate portion of racemes thickish, the spikelets rather broadly ovate" (Swallen, 1955; pp. 363-364).

"Perennial, the culms stout, 3-3.6 m high, the nodes black, prominent; leaf blades 45-60 cm long, 7.5-10 cm broad, the margins scabrous; inflorescence 22-30 cm long, the spikes fascicled; spikelets 6-9 mm long, lacking an awn" (Smith, 1979; p. 389).

Description from GrassBase.

Habitat/ecology:  In Fiji, introduced as a fodder grass and persisting (Smith, 1979; p. 389).  In New Caledonia, "cultivé et spontané mais peu commun" (MacKee, 1994; p.63). In Guatemala, "edges of pine forests, slopes, and hilltops, up to 2,000 meters" (Swallen, 1955; pp. 363-364).

Propagation:  Seed

Native range:  Mexico (Smith, 1979; p. 389). Mexico, Guatemala, Belize, El Salvador (Swallen, 1955; pp. 363-364).

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
Viti Levu Island introduced
invasive
cultivated
Smith, Albert C. (1979) (p. 389)
Vouchers cited: DA 5594, DA 9120
French Polynesia
Society Islands
Raiatea (Havai) Island introduced
invasive
Welsh, S. L. (1998) (p. 347)
Vouchers cited: Florence 3492, Fosberg & Sachet 63198
French Polynesia
Society Islands
Raiatea (Havai) Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Vouchers cited: J. Florence 3492 (PAP), F.R. Fosberg & M.-H. Sachet 63198 (PAP)
Adventice
French Polynesia
Society Islands
Tahiti Island introduced
invasive
cultivated
Welsh, S. L. (1998) (p. 347)
Voucher cited: Fosberg 62762
French Polynesia
Austral (Tubuai) Islands
Rurutu Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Adventice
Guam
Guam Island
Guam Island introduced
cultivated
Stone, Benjamin C. (1970) (p. 240)
Introduced experimentally in 1920.
Guam
Guam Island
Guam Island introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 62)
New Caledonia
New Caledonia Archipelago
Île Grande Terre introduced
invasive
cultivated
MacKee, H. S. (1994) (p. 63)
Voucher cited: MacKee 39363
Niue
Niue
Niue Island introduced
cultivated
Sykes, W. R. (1970) (p. 253)
Voucher cited: CHR 188599
Niue
Niue
Niue Island introduced
invasive
Space, James C./Waterhouse, Barbara M./Newfield, Melanie/Bull, Cate (2004) (p. 47)
Philippines
Philippine Islands
Philippine Islands   Hafliger, Ernst/Scholz, Hildemar (1980) (p. 141)
Solomon Islands
Solomon Islands
Solomon Islands introduced
cultivated
Hancock, I. R./Henderson, C. P. (1988) (p. 116)
Pacific Rim
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Central America
Central America (Pacific rim)
Costa Rica (Republic of)   Holm, Leroy/Pancho, Juan V./Herberger, James P./Plucknett, Donald L. (1979) (p. 370)
Central America
Central America (Pacific rim)
Guatemala (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Indonesia
Indonesia
Indonesia (Republic of)   Hafliger, Ernst/Scholz, Hildemar (1980) (p. 141)
Malaysia
Malaysia
Malaysia (country of)   Holm, Leroy/Pancho, Juan V./Herberger, James P./Plucknett, Donald L. (1979) (p. 370)
Mexico
Mexico
Mexico (United Mexican States) native
Smith, Albert C. (1979) (p. 389)
South America (Pacific rim)
South America (Pacific rim)
Colombia (Republic of)   Holm, Leroy/Pancho, Juan V./Herberger, James P./Plucknett, Donald L. (1979) (p. 370)


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This page was created on 20 MAR 2005 and was last updated on 30 NOV 2008.