(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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ORYZA
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PlaceOfPublication
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Sp. Pl. 333. 1753.
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Description
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Spikelets 1-flowered, disarticulating below the glumes, laterally compressed; glumes narrow, much shorter than the lemma (in our species); lemma indurate, rigid, keeled, 3-nerved, awned or sometimes awnless, sparsely to rather densely hispid; palea similar to the lemma but narrower and with no midnerve on the back, the two nerves close to the margins.
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Note
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Annuals or perennials with flat blades and open or contracted panicles.
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Key
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a. Plants annual, cultivated, sometimes escaped - - 1. 0. SATIVA aa. Plants perennial, native. b. Spikelets 8-9 mm. long; awns 5-10 cm. long; panicles narrow; blades 7-14 mm. wide --- -- 2. 0. PERENNIS bb. Spikelets 5 mm. long; awns 1-2 cm. long; panicles large and open; blades 1-3.5 cm. wide --- -- -- 3. 0. LATIFOLIA
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