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13. CAREX sect. ACROCYSTIS Dumortier, Fl. Belg. 147. 1827.
玉簪薹草组 yu zan tai cao zu
Authors: Lun-Kai Dai & Tetsuo Koyama
Culms usually rather short. Leaf blades narrow, lower leaf sheaths red-brown. Involucral bracts shorter than inflorescence, blades scalelike or lowermost one linear or setaceous. Spikes 3-5, rather contiguous; terminal spike male; lateral spikes female, sessile or subsessile. Female glumes red-brown. Utricles obliquely patent, obovate or ovate, inflated trigonous, membranous, usually hirtellous, apex shortly beaked, orifice emarginate or slightly 2-toothed. Nutlets tightly enveloped, trigonous; style base not thickened; stigmas 3.
About 35 species: circumboreal in Asia, Europe, and North America; five species in China.
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| 1 |
Utricles distinctly veined |
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(2) |
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Utricles obscurely veined or nerveless |
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(3) |
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| 2 (1) |
Leaf blades glabrous; female glumes ovate, ca. 2 mm, costa not projecting beyond apex forming a mucro; utricles obovate, 2.5-3 mm. |
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66 C. globularis |
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Leaf blades hispid; female glumes oblong, ca. 4 mm, costa usually projecting beyond apex forming a mucro; utricles oblong-obovate, 4-4.5 mm. |
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67 C. ulobasis |
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| 3 (1) |
Involucral bracts scalelike; female glumes mucronate at apex. |
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70 C. vanheurckii |
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Lower involucral bract blades leaflike, sometimes rather narrow, upper ones scalelike; female glumes not mucronate at apex |
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(4) |
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| 4 (3) |
Female glumes broadly ovate, 2.2-2.5 mm; utricles obovate, 2.5-2.8 mm, yellowish green. |
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68 C. chinganensis |
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Female glumes ovate, ca. 3 mm; utricles oblong-obovate, 3-3.5 mm, yellowish brown. |
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69 C. amgunensis |
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Lower Taxa
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