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(Last Modified On 10/22/2012)
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(Last Modified On 10/22/2012)
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Species
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SETARIA BARBATA (Lam.) Kunth
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PlaceOfPublication
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Rev. Gram. 1:47. 1829.
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Synonym
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Panicum barbatum Lam. Tabl. Encycl. 1:171. 1791. Panicum costatum Roxb. Fl. Ind. ed. Carey 1:314. 1820. Panicum viaticum Salzm. ex Doell, in Mart. Fl. Bras. 22:155. 1877. Chamaeraphis viatica Kuntze, Rev. Gen. P1. 2:770. 1891. Chamaeraphis costata Kuntze, Rev. Gen. P1. 2:771. 1891. Chaetochloa barbata Hitchc. & Chase, Contr. U. S. Nat. Herb. 18:348. 1917.
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Description
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Annual; culms erect or usually decumbent-spreading and rooting at the lower nodes, 25 cm. in depauperate plants, to as much as 2 m. long, branching, usually pubescent or villous below the densely pubescent nodes; sheaths compressed, glabrous or papillose-hispid; ligule 1 mm. long, densely ciliate; blades elliptic, acuminate, narrowed at the base, scabrous and papillose-hispid, thin, plaited, as much as 30 cm. long, 3 cm. wide, in depauperate specimens 5-10 cm. long, 5-15 mm. wide, often obscurely plaited; panicles commonly 7-10 cm., or as much as 20 cm. long, the axis scabrous and sparsely villous, the short branches approximate, ascending to spreading, densely flowered to the base; spikelets about 2.5 mm. long, usually in pairs along the raceme-like branches, the bristles 5-10 mm. long; first glume obtuse or subacute, one-third as long as the spikelet, the second acute, 7- nerved, two-thirds as long as the spikelet; fruit elliptic, acute, strongly transversely rugose.
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Distribution
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Introduced from tropical Asia; Florida, West Indies, Panama, and Brazil.
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Specimen
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CANAL ZONE: Culebra, Standley 25954.
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