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POACEAE Tribe ORYZEAE
Annual or perennial herbs, usually aquatic. Leaf-blades linear or sometimes broad and falsely petiolate; ligule membranous. Inflorescence of pedicelled spike-lets in open or contracted panicles. Spikelets all alike, bisexual, 1-flowered or 3-flowered with the 2 lower florets reduced to narrow glume-like lemmas, disarticulating above the glumes at maturity; glumes almost suppressed, often discernible as obscure lips at the tip of the pedicel; lemma chartaceous or coriaceous, ± laterally flattened, 3-9-nerved, awnless or awned from the tip; palea similar in shape and texture to the lemma; lodicules 2, bilobed or entire; stamens usually 6; stigmas 2. Grain with small embroy and linear hilum; starch grains compound. Chromosomes small, basic number 12.
7 genera in tropical and warm temperate regions throughout the world; 3 genera with 4 species in Pakistan.
A widespread tribe of aquatic grasses whose anatomy suggests a relationship with Bambuseae.
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| 1 |
Leaf-blades ovate-oblong with inflated sheaths; glumes absent; floret 1; lemma awned; a floating grass |
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Hygroryza |
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Leaf-blades linear, acute or acuminate; sheaths not inflated; aquatic grasses |
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(2) |
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| 2 (1) |
Fertile lemma supported by 2 empty scales; tip of pedicel with 2 obscure lips |
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Oryza |
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Fertile lemma solitary; tip of pedicel without lips; spikelets imbricate |
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Leersia |
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Lower Taxa
Related Synonym(s):
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Treatments in Other Floras @ www.efloras.org
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