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(Last Modified On 10/12/2012)
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(Last Modified On 10/12/2012)
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Species
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CHLORIS VIRGATA
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PlaceOfPublication
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Fl. Ind. Occ. 203. 1797.
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Synonym
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Chloris pubescens Lag. Var. Cienc. 4:143. 1805. Rabdochloa virgata Beauv. Ess. Agrost. 84, 158. 1812. Chloris compressa DC. Cat. Hort. Monsp. 94. 1813. Chloris elegans H.B.K. Nov. Gen. & Sp. 1:166. P1. 49. 1816. Chloris alba Presl, Rel. Haenk. 1:289. 1830. Chloris alba var. aristulata Torr. U. S. Rep. Expl. Miss. Pacif. 4:155. 1857. Agrostomia barbata Cervant. Naturaleza 1:346. 1870.
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Description
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Annual; culms erect, or usually decumbent at the base, sometimes rooting at the lower nodes, 10 cm. to more than 1 m. high; sheaths compressed-keeled, glabrous, mostly longer than the internodes; ligule very short, minutely ciliate; blades flat, 4-25 cm. long, 3-7 mm. wide, scaberulous or nearly smooth on both surfaces, sometimes more or less papillose-pilose on the upper surface near the base, the margins scabrous; spikes 3-15 (usually about 6), 3-9 cm. (usually 5-6 cm.) long, erect or narrowly ascending, flexuous, crowded in a rather dense silvery head; spikelets 3-3.5 mm. long; glumes acuminate, 1-nerved, scabrous on the keel, the first 1.5-2.5 mm. long, the second 2.5-3 mm. long, with an awn about 1 mm. long; fertile floret 3-3.5 mm. long, the callus bearded, the lemma acute, the keel bowed out at the middle, short-ciliate on the margins on the lower part, long-ciliate on the upper third, the hairs as much as 4 mm. long, the awn rather stout, 6-10 mm. long, scabrous; rudiment 2-2.5 mm. long, about 0.7 mm. wide, subacute, the awn 5-7 mm. long.
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Distribution
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A weed in fields and waste places, central and southwestern United States, Mexico, and the West Indies; also in South America and the Old World.
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Specimen
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CANAL ZONE: Barro Colorado Island, Kenoyer ii9; Balboa, Standley 25623.
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