(Last Modified On 10/22/2012)
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(Last Modified On 10/22/2012)
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Genus
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ECHINOCHLOA Beauv.
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PlaceOfPublication
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Ess. Agrost. 53. pi. II. f. 2. 1812.
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Description
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Spikelets subsessile, solitary or in pairs in two rows on one side of a slender rachis, scabrous and sparsely to prominently hispid; first glume broad, triangular, acute, 3-nerved; second glume and sterile lemma nearly equal, 5- to 7-nerved, the lateral nerves approximate, mucronate, or the glume short-awned, the lemma long- awned, sometimes enclosing a palea and staminate flower; fruit plano-convex, elliptic, minutely crested, indurate, shining, minutely striate, the margins of the lemma not inrolled, the tip of the palea not enclosed.
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Note
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Slender to coarse annuals or perennials with compressed sheaths, linear blades, and few to many densely flowered racemes, distant or approximate on a main axis.
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Key
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a. Ligule a dense line of long yellowish hairs; plants perennial 1. E. SPECTABILIS aa. Ligule wanting; plants annual. b. Spikelets 3 mm. long, strongly hispid, the sterile lemma with an awn 1-10 mm. long; culms coarse, erect or decumbent at the base - 2. E. CRUSPAVONIS bb. Spikelets 2-2.5 mm. long, scabrous, sparsely and inconspicuously hispid, the second glume and sterile lemma mucronate only; culms slender, erect to prostrate-spreading -3. E. COLONUM
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