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Published In: Species Plantarum 1: 333. 1753. (1 May 1753) (Sp. Pl.) Name publication detailView in BotanicusView in Biodiversity Heritage Library

Project Name Data (Last Modified On 6/2/2011)
Acceptance : Accepted
Project Data     (Last Modified On 6/3/2011)
General/Distribution: 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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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.

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1 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. Oryza sativa
+ 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 Oryza coarctata
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