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5. Eriophorum Linnaeus, Sp. Pl. 1: 52. 1753.
羊胡子草属 yang hu zi cao shu
Authors: Prof. Song-Yun Liang, Gordon C. Tucker & David A. Simpson
Erioscirpus Palla.
Herbs, perennial. Rhizomes creeping. Culms tufted or nearly scattered, obtusely 3-angled, clothed at base with bladeless leaf sheaths. Leaves basal and cauline; leaf blade of basal leaves slender, elongate, flat or 3-angled; cauline leaves usually reduced to a sheath. Involucral bracts spathelike or glumelike, rarely leaflike. Inflorescence a terminal simple or compound anthela or reduced to a single spikelet. Spikelets with few to many spirally arranged deciduous glumes. Glumes each subtending a bisexual flower. Perianth bristles 10-30, white or brownish red, elongating extremely after anthesis, smooth, silky. Stamens 3. Style base not distinct, not or slightly thickened; stigmas 3. Nutlet obovoid to oblong, 3-sided, smooth, apex beaked.
About 25 species: mostly in cool temperate, alpine, and arctic regions of N Hemisphere; seven species (one endemic) in China.
Eriophorum japonicum, recognized by Tang and F. T. Wang (Fl. Reipubl. Popularis Sin. 11: 36. 1961), is a synonym of Scirpus maximowiczii in this treatment (see p. 174).
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| 1 |
Spikelets solitary, terminal; involucral bracts glumelike |
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(2) |
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Spikelets many, arranged in a compound or single anthela; involucral bracts leaflike or spathelike |
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(4) |
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| 2 (1) |
Perianth bristles pale reddish brown to reddish; nutlet spinulate on apical margin. |
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6 E. russeolum |
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Perianth bristles white or pure white; nutlet smooth |
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(3) |
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| 3 (2) |
Culms tufted; perianth bristles white; nutlet obovoid; anthers ca. 2 mm. |
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5 E. vaginatum |
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Culms scattered; perianth bristles pure white; nutlet oblong; anthers ca. 1 mm. |
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7 E. scheuchzeri |
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| 4 (1) |
Spikelets arranged in a compound anthela; involucral bracts leaflike |
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(5) |
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Spikelets arranged in a simple anthela; involucral bracts spathelike |
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(6) |
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| 5 (4) |
Spikelets many, densely congested capitate; glumes reddish brown with red lines, oblong. |
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1 E. transiens |
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Spikelets solitary or a cluster of 2 or 3; glumes brown, ovate-lanceolate. |
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2 E. comosum |
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| 6 (4) |
Glumes usually 1-veined; culms ± stout; leaf blade 3-5(-7) mm wide, flat but apex 3-angled. |
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3 E. angustifolium |
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Glumes many veined; culms ± slender; leaf blade ca. 1 mm wide, compressed 3-angled. |
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4 E. gracile |
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Lower Taxa
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