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4. Poaceae Tribe ORYZEAE
稻族 dao zu
Authors: Liang Liu & Sylvia M. Phillips
Annuals or perennials. Leaf blades usually linear, rarely elliptic; ligule membranous. Inflorescence a panicle, occasionally with simple racemelike primary branches; spikelets all alike or the sexes separate. Spikelets with 1 floret, mostly laterally compressed, rachilla extension absent, falling entire; glumes absent or reduced to small scales at base of floret; lemma membranous to leathery, keeled, 5–10-veined, entire, with or without a straight awn from the apex; palea resembling lemma but narrower, 3–7-veined with central keel. Lodicules 2. Stamens usually 6 (1 in Chikusichloa). Caryopsis linear to ovoid. Leaf anatomy:non-Kranz; microhairs slender (apical cell short and inflated in Hygroryza); fusoid cells present or absent. x = 12 (in Zizania 15, 17).
Thirteen genera and ca. 70 species: tropical and warm-temperate regions of the world; five genera and thirteen species (two introduced) in China.
This is a widespread tribe of aquatic and marshland grasses. It can be recognized by its multi-veined keeled palea, and usually by the presence of 6 stamens.
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1 |
Spikelet with 2 narrow scales below the floret. |
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37 Oryza |
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Spikelet without scales below the floret (if rarely present, anther 1) |
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(2) |
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2 (1) |
Spikelets unisexual. |
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41 Zizania |
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Spikelets bisexual |
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(3) |
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3 (2) |
Floret sessile; leaf blades linear. |
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38 Leersia |
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Floret stipitate |
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(4) |
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4 (3) |
Leaf blades linear, 20–50 cm; stamen 1. |
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39 Chikusichloa |
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Leaf blades elliptic, 3–7 cm; stamens 6. |
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40 Hygroryza |
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Lower Taxa
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Treatments in Other Floras @ www.efloras.org
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