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1. Hypolytrum Persoon, Syn. Pl. 1: 70. 1805.
割鸡芒属 ge ji mang shu
Authors: Lun-Kai Dai, David A. Simpson & Gordon C. Tucker
Herbs, perennial, moderately robust to robust, rhizomatous [or stoloniferous]. Roots coarse. Culms central or lateral, if lateral then with cataphylls at base. Leaves 3-ranked, basal or cauline, ligulate; basal leaf sheath folded, adaxially open, cauline leaf sheath tubular; leaf blade leathery, glabrous. Involucral bracts leaflike or glumelike, basal bract usually longest. Inflorescence usually an open compound panicle or capitate, with 1 to many spikes. Spikes comprising many spirally imbricate glumelike bracts each subtending a bisexual spikeletlike unit with a much reduced axis (pseudospikelet). Pseudospikelets comprising a naked apparently terminal female flower and 2(or 3) glumes all subtending a male flower comprising 1 stamen; basal 2 glumes opposite, keeled. Perianth bristles absent. Stigmas 2 or 3. Nutlet with a sculptured hard outer surface, apex often conically rostrate or sometimes mucronate.
About 60 species: tropical and subtropical regions; four species (two endemic) in China.
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1 |
Culms central; inflorescences paniculate with many spikes; basalmost involucral bract 15-30 × 0.7-1.7 cm, much longer than inflorescence. |
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1 H. nemorum |
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Culms lateral; inflorescences capitate, with 1 to many spikes; basalmost involucral bract 1.5-5 × ca. 5 cm, shorter to slightly longer than inflorescence |
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(2) |
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2 (1) |
Culms 30-45 cm; leaf blade 2-6 mm wide; spike 1(or 2). |
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4 H. shurenii |
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Culms 5-40 cm; leaf blade 1-2 cm wide; spikes few to many |
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(3) |
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3 (2) |
Culms 5-10 cm tall; spikes few; nutlet olivaceous, subglobose, ca. 2 mm, apex mucronate. |
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2 H. paucistrobiliferum |
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Culms 30-40 cm tall; spikes many; nutlet brown, obovoid to ovoid, ca. 3 mm, apex conically rostrate. |
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3 H. hainanense |
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Lower Taxa
Related Links (opens in a new window) |
Treatments in Other Floras @ www.efloras.org
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