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Oryza Linn., Sp. Pl. 1:333. 1753. Gen. Pl., ed. 5, 155. 1754; Hook.f., Fl. Brit. Ind. 7:92. 1896; Blatter & McCann, Bombay Grasses 273. 1935; Bor, Fl. Assam 5:169. 1940; Sultan & Stewart, Grasses W. Pak. 2: 369. 1959; Bor, Grasses Burma Ceyl. Ind. Pak. 601. 1960; Tateoka in Bot. Mag., Tokyo 76:165. 1963; Bor in Towns., Guest & Al-Rawi, Fl. Iraq 9: 46. 1968; Bor in Rech. f., Fl. Iran. 70: 6. 1970; Tzvelev, Poaceae URSS 97.1976; Tutin in Tutin et al., Fl. Eur. 5: 260. 1980.
Erect annuals or perennials with flat leaf-blades and membranous ligules. Panicle open or rather dense; branches numerous, racemose with shortly pedicelled spikelets. Spikelets 3-flowered, strongly laterally compressed, falling entire from the pedicel; glumes absent or represented by obscure lips at the pedicel-tip; both lower florets represented only by narrow lemmas, these usually subulate or linear and much shorter than the spikelet. Upper floret fertile; lemma coriaceous, strongly keeled, prominently 5-nerved, with or without an awn; palea similar but narrower, keeled, 3-nerved; stamens 6; stigmas 2.
A genus of 20 species; marsh plants of both hemisphers in tropical and subtropical regions; 2 species in Pakistan, one extensively cultivated.
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Sterile lemmas subulate; spikelets narrowly ovate to narrowly oblong, deciduous; fertile lemma with a short, rigid awn point; ligule of lower leaves a ciliate rim about 1 mm long |
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Oryza coarctata |
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Sterile lemmas oblong or narrowly ovate, quite obvious; spikelets ovate, persistent; fertile lemma awn-less or with a very long flexuous awn; ligule of lower leaves membranous, acute, very, long, 15.45 mm. |
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Oryza sativa |
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Lower Taxa
Related Synonym(s):
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