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13. Bulbostylis Kunth, Enum. Pl. 2: 205. 1837.
球柱草属 qiu zhu cao shu
Authors: Prof. Song-Yun Liang & Gordon C. Tucker
Herbs, annual [or perennial]. Culms tufted, very slender. Leaves with a leaf blade or rarely reduced to a bladeless sheath, mouth with lax white hairs; leaf blade filiform to linear, margin often involute. Involucral bracts leaflike or setaceous. Inflorescence a terminal simple or compound anthela or capitate, sometimes reduced to a single spikelet. Spikelets ovoid to ellipsoid, many flowered. Glumes spirally arranged or rarely distichous, herbaceous or membranous, deciduous, subtending a flower but basal 1 or 2 empty. Flowers bisexual. Perianth bristles absent. Stamens (1 or)2(or 3). Style filiform, base thickened, bulbous, and persistent in fruit; stigmas 3. Nutlet obovoid to obpyriform, 3-sided.
About 100 species: tropical to temperate regions worldwide with high concentration of species in tropical Africa and tropical America; three species in China.
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| 1 |
Spikelets 2-15, sessile in a capitate inflorescence; glumes brownish to yellowish green, apex with a recurved short awn. |
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3 B. barbata |
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Spikelet single, in a simple to compound anthela; glumes brownish to brown, apex mucronate |
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(2) |
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| 2 (1) |
Glumes glabrous, apex obtuse; nutlet irregularly puncticulate. |
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1 B. densa |
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Glumes pubescent, apex acute; nutlet undulate-corrugate. |
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2 B. puberula |
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Lower Taxa
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