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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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CENCHRUS ECHINATUS L.
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PlaceOfPublication
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Sp. P1. 1050. 1753.
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Synonym
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Cenchrus pungens H.B.K. Nov. Gen. & Sp. 1:115. 1815. Cenchrus brevisetus Fourn. Mex. Pl. 2:50. 1886. Cenchrus echinatus brevisetus Scribn. in Millsp. Field Mus. Bot. 2:26. 1900.
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Description
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Annual; culms erect to geniculate or decumbent-spreading, often rooting at the nodes, branching, as much as 1 m. long, glabrous; sheaths compressed, keeled, glabrous, or ciliate on the margins near the summit; ligule ciliate, 1 mm. long; blades mostly 6-20 cm. long, 3-8 mm. wide, acuminate, more or less pilose; spikes 3-10 cm. long, the axis rather stout, flexuous, scabrous; burs scarcely crowded, 4-7 cm. long, usually broader than long, pubescent, containing 3-6 spikelets, the bristles below the bur fewer and stouter than in C. bro'wnii, the lobes or spines erect to spreading, retrorsely barbed at the tip; spikelets 4.5-6 mm. long; first glume small, narrow, 1-nerved, the second two-thirds to three-fourths as long as the nearly equal fruit and sterile lemma; fruit acuminate, the nerves of the lemma apparent near the tip.
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Distribution
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Open, especially sandy, ground, and waste places, southern United States and the West Indies to Argentina.
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Specimen
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CANAL ZONE: between Mindi and Colon, Hitchcock 7949; Frijoles, Standley 27649; Ancon, Bro. Celestine 27; Balboa, Hitchcock 7994, 800i; Maxon 6837; Standley 30875. PANAMA: Bella Vista, Standley 25376; Taboga Island, Woodson, Allen d Seibert 1540.
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