(Last Modified On 10/16/2012)
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(Last Modified On 10/16/2012)
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Genus
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SPOROBOLUS
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PlaceOfPublication
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Prodr. Fl. Nov. Holl. 169. 1810.
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Synonym
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Agrosticula Raddi, Agrost. Bras. 3 3. 1 8 2 3. Bennetia Raf. Bull. Bot. Seringe 1:220. 1830. Cryptostachys Steud. Syn. P1. Glum. 1:181. 1854. Bauchea Fourn. Mex. P1. 2:87. 1886.
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Description
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Spikelets 1-flowered, disarticulating above the glumes; glumes awnless, sub- equal or usually unequal, the second often as long as the spikelet; lemma 1-nerved, acute to obtuse, awnless; palea as long as or sometimes longer than the lemma. Annuals or perennials with open or contracted, often spike-like, panicles of small spikelets.
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Key
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a. Plants annual; panicles narrow, dense, purplish - -- 1. S. CILIATUS aa. Plants perennial; panicles open, or if dense, green, not purple. b. Culms wiry, creeping, with hard scaly rhizomes. Seacoast plants 5. S. VIRGINICUS bb. Culms cespitose, erect, without rhizomes. c. Panicles narrow but open, the branches verticillate, spreading to reflexed; lower sheaths densely ciliate on the margins with long hairs --- -2. S. CUBENSIS cc. Panicles dense and spike-like or somewhat open but the branches ascending or appressed, not verticillate; lower sheaths glabrous on the margins. d. Panicles dense and spike-like; spikelets 2-2.4 mm. long; glumes unequal, the first 0.5 mm. long, the second 0.7-1 mm. long 3. S. POIRETII dd. Panicles scarcely dense, the slender branches ascending to spread- ing; spikelets 1.6-1.8 mm. long; glumes subequal, 0.3-0.5 mm. long __ _ _ _ _ __ _ _ _ __ ________ 4. S. INDICUS
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