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
Colombia
Colombia
Colombia (Republic of)   Holm, Leroy/Pancho, Juan V./Herberger, James P./Plucknett, Donald L. (1979) (p. 370)
Costa Rica
Costa Rica
Costa Rica (Republic of)   Holm, Leroy/Pancho, Juan V./Herberger, James P./Plucknett, Donald L. (1979) (p. 370)
Guatemala
Guatemala
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)


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