Pacific Island Ecosystems at Risk (PIER)

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Setaria barbata
Kunth., Poaceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Common name(s): [more details]

English: bristly foxtail grass, bristly foxtailgrass, corn grass, East Indies foxtailgrass, Mary grass

French: grosse traînasse, herbe bambou, herbe bassine, herbe tourterelle

Habit:  grass

Description:  "Annual, the culms slender, up to 60 cm high; sheaths hairy, the leaf blades narrow, lanceolate, 7.5-25 cm long, about 4 cm broad, the branches ascending, 0.5-2.5 cm long; spikelets alike, oblong to ovate, 2.5-3 mm long, 2-flowered, the upper floret perfect, awnless, each usually subtended by a single bristle about 10 mm long"  (Smith, 1979; pp. 350-351).

"Habit: Annual; caespitose. Culms 10-150(-200) cm long; without nodal roots, or rooting from lower nodes. Ligule a fringe of hairs. Leaf-blades linear, or lanceolate; plicate; 5-30 cm long; 5-20(-30) mm wide; dark green. Inflorescence: Inflorescence a panicle. Panicle open; elliptic; 3-25 cm long; contracted about primary branches. Primary panicle branches bearing spikelets almost to the base; sterile at the tips. Panicle branches pubescent, or pilose. Spikelets subtended by an involucre. Fertile spikelets pedicelled; 1 in the cluster. Involucre composed of bristles; 1-15 mm long. Involucral bristles persistent; 6-8 in principal whorl; flexible; antrorsely scaberulous; glabrous. Fertile spikelets: Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; compressed slightly; 2-3.2 mm long; falling entire. Glumes: Glumes shorter than spikelet; thinner than fertile lemma. Lower glume ovate; 0.25-0.33 times length of spikelet; membranous; without keels; 3-5 -veined. Lower glume apex obtuse. Upper glume elliptic; 0.66-0.8 times length of spikelet; membranous; without keels; 5-9 -veined. Upper glume apex obtuse. Florets: Basal sterile florets male, or barren; with palea. Lemma of lower sterile floret oblong; 1 times length of spikelet; membranous; 7-veined; without grooves, or sulcate; obtuse. Fertile lemma ovate; dorsally compressed; gibbous; 2-3 mm long; indurate; without keel. Lemma surface rugose. Lemma margins involute. Lemma apex apiculate. Palea involute; indurate. Palea surface rugose" (GrassBase).

Habitat/ecology:  In Fiji, "a moderately common grass occurring from sea level to about 200 m, often sprawling or scrambling on shrubs in thickets, forest clearings, plantations, and along roadsides in damp, shaded places" (Smith, 1979; pp. 350-351). In New Caledonia, "mauvaise herbe introduite depuis longtemps mais peu commune" (MacKee, 1994; p. 62).

Propagation:  Seed

Native range:  Tropical Asia, Africa and America (Smith, 1979; pp. 350-351).

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
Koro Island introduced
invasive
Smith, Albert C. (1979) (p. 350)
Voucher cited: DA 988
Fiji
Fiji Islands
Ovalau Island introduced
invasive
Smith, Albert C. (1979) (p. 350)
Voucher cited: DA 1365
Fiji
Fiji Islands
Taveuni Island introduced
invasive
Smith, Albert C. (1979) (p. 350)
Vouchers cited: Smith 8124, DA 8939, DA 8873, DA 8902
Fiji
Fiji Islands
Vanua Levu Island introduced
invasive
Smith, Albert C. (1979) (p. 350)
Vouchers cited: DA 3660, DA 5691, DA 9631
Fiji
Fiji Islands
Vanua Mbalavu Island introduced
invasive
Smith, Albert C. (1979) (p. 350)
Vouchers cited: Smith 1422, DA 10209
Fiji
Fiji Islands
Viti Levu Island introduced
invasive
Smith, Albert C. (1979) (p. 350)
Vouchers cited: Degener & Ordonez 13515, DA 8676, DA 8977
French Polynesia
Society Islands
Tahiti Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Setaria aff. barbata. Voucher cited: J. Florence (legit J.-C. Janicaud) 2809 (PAP)
Adventice
Japan (offshore islands)
Ogasawara (Bonin) Islands
Bonin (Ogasawara) Islands introduced
Kato, Hidetoshi (2007)
New Caledonia
New Caledonia Archipelago
Île Grande Terre introduced
invasive
MacKee, H. S. (1994) (p. 62)
Voucher cited: Baudouin s.n. s.loc.
New Guinea (Indonesia and Papua New Guinea)
New Guinea Island
New Guinea Island   Holm, Leroy/Pancho, Juan V./Herberger, James P./Plucknett, Donald L. (1979) (p. 332)
Philippines
Philippine Islands
Philippine Islands native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Samoa
Western Samoa Islands
Western Samoa Islands   Swarbrick, John T. (1997) (p. 96)
Solomon Islands
Solomon Islands
Solomon Islands native
Hancock, I. R./Henderson, C. P. (1988) (p. 109)
Tonga
Tonga Islands
Tonga Islands   Swarbrick, John T. (1997) (p. 96)
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. (2013)
Indonesia
Indonesia
Indonesia (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Japan
Japan
Japan (country) introduced
Mito, Toshikazu/Uesugi, Tetsuro (2004) (p. 192)
Singapore
Singapore
Singapore (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Singapore
Singapore
Singapore (Republic of) introduced
invasive
Chong, Kwek Yan/Tan, Hugh T. W./Corlett, Richard T. (2009) (p. 79)
Naturalised
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
Mauritius
Mautitius Islands (Mauritius and Rodrigues)
Mauritius Island native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Seychelles
Seychelles Islands
Frégate Island   Robertson, S. A./Todd, D. M. (1983) (p. 58)
Vouchers cited: Procter 4162, Robertson 2642
Also reported from
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
United States (continental except west coast)
United States (other states)
USA (Florida) introduced
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Naturalized


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This page was created on 20 AUG 2002 and was last updated on 30 NOV 2008.