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176. Pseudoraphis Griffith ex Pilger, Notizbl. Bot. Gart. Berlin-Dahlem. 10: 210. 1928.
伪针茅属 wei zhen mao shu
Authors: Shou-liang Chen & Sylvia M. Phillips
Aquatic or semi-aquatic perennials. Culms decumbent to stoloniferous, many-noded, rooting at lower nodes or floating. Leaf sheaths compressed; leaf blades linear to lanceolate; ligule membranous or ciliate. Inflorescence open or contracted, composed of racemes on all sides of a common axis; racemes solitary or grouped, rachis slender, bearing 1 to several alternate shortly pedicelled spikelets, terminating in a bristle. Spikelets lanceolate, terete or slightly dorsally compressed, florets 2; lower glume very small, veinless; upper glume equaling the spikelet, firmly herbaceous, scabrous to setose, long-acuminate or briefly awned; lower lemma resembling upper glume but usually slightly shorter, enclosing a shorter hyaline palea; upper floret 1/2 as long, shortly stipitate, membranous, smooth, shiny. Caryopsis eventually much larger than upper floret and filling spikelet when mature. x = 7, 9.
Six species: India to Japan and throughout SE Asia to Australia; three species in China.
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| 1 |
Inflorescence open, lanceolate to ovate; racemes spreading, 2–3-spiculate. |
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1 P. brunoniana |
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Inflorescence contracted, linear to oblong; racemes erect, usually 1-spiculate |
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(2) |
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| 2 (1) |
Spikelets numerous; upper glume longer than lower lemma, narrowly acuminate; lower lemma 7-veined; 2 stamens in lower floret |
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2 P. sordida |
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Spikelets 10 or less; upper glume slightly shorter than lower lemma, acute; lower lemma 13-veined; 3 stamens in lower floret. |
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3 P. balansae |
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Lower Taxa
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