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(Last Modified On 10/16/2012)
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(Last Modified On 10/16/2012)
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Species
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PASPALUM BOSCIANUM
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PlaceOfPublication
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Monogr. Pasp. 170. 1810.
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Synonym
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Paspalum virgatum Walt. Fl. Carol. 75. 1788. Not P. virgatum L., 1759. Paspalum purpurascens Ell. Bot. S. C. & Ga. 1:108. pl. 6. f. 3. 1816. Paspalum confertum LeConte, Jour. de Phys. Chym. 91:285. 1820. Paspalum virgatum var. purpurascens Wood, Class-book. ed. 3. 781. 1861.
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Description
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Annual; culms 20-100 cm. high, ascending or spreading, branching, some- times rooting at the lower nodes, glabrous; sheaths compressed, keeled, longer than the internodes, glabrous or the lowermost rarely pilose; ligule 2-3.5 mm. long, brown; blades 10-40 cm. long, mostly 15-30 cm., 6-18 mm. wide, glabrous or papillose-pilose on the upper surface toward the base, the margins very scabrous; racemes 2-15, rarely solitary in depauperate plants, 2.5-9 cm. long, ascending or finally spreading, somewhat arcuate, the rachis 2-2.5 mm. wide, scabrous on the margins, usually with a tuft of long hairs at the base; spikelets 2-2.2 mm. long, paired, crowded, obovate to suborbicular, glabrous, rusty brown at maturity, the glume and sterile lemma equal, barely covering the fruit, fragile, not wrinkled; fruit dark brown, shining, minutely papillose-striate.
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Distribution
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Moist or wet open ground and waste places, sometimes a weed in cultivated fields, Virginia to Florida and Louisiana; Guatemala, Panama, Puerto Rico, and northern Brazil.
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Specimen
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CHIRIQUi: David, Hitchcock 8359. PANAMA: Chivi Chivi, Killip 4084.
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