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| 1 |
Lower involucral bracts leaflike |
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(2) |
| + |
Lower involucral bracts setaceous |
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(8) |
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| 2 (1) |
Upper 1-3 spikes male |
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(3) |
| + |
Terminal spike male |
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(4) |
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| 3 (2) |
Utricles 4-5 mm, slightly longer than subtending glume; basal sheaths rather long, yellow-brown. |
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402 C. middendorffii |
| + |
Utricles ca. 3 mm, ca. 1/2 as long as subtending glume; basal sheaths rather short, red-brown or red-purple. |
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403 C. cryptocarpa |
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| 4 (2) |
Utricles shorter than glume |
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(5) |
| + |
Utricles longer than glume |
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(6) |
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| 5 (4) |
Female glumes oblong or ovate-lanceolate, 3.5-4 mm; utricles oblong, ca. 3 × 1.2 mm. |
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397 C. zhonghaiensis |
| + |
Female glumes ovate-oblong or elliptic, ca. 2.5 mm; utricles elliptic, 2-2.5 mm. |
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398 C. minxianica |
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| 6 (4) |
Utricles broadly obovate or suborbicular; female glumes 1.5-1.7 mm. |
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399 C. platysperma |
| + |
Utricles broadly ovate, broadly elliptic, or ovate; female glumes 2-3 mm |
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(7) |
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| 7 (6) |
Utricles broadly ovate or broadly elliptic, 2.5-3 mm; female glumes ca. 2.5 mm, rounded at apex. |
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400 C. muliensis |
| + |
Utricles ovate, 2.2-2.5 mm; female glumes ca. 2 mm, truncate at mucronate apex. |
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401 C. kiotensis |
| |
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| 8 (1) |
Utricles suborbicular, ovate-orbicular, or obovate-orbicular |
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(9) |
| + |
Utricles ovate or elliptic |
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(12) |
| |
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| 9 (8) |
Female spikes ovate to oblong, sessile or lower with peduncles 1.5-3 mm |
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(10) |
| + |
Female spikes cylindric, lower with peduncles 5-20 mm |
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(11) |
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| 10 (9) |
Rhizome with stolons; utricles suborbicular or subglobose, beak very short, orifice entire or emarginate with small teeth. |
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389 C. orbicularis |
| + |
Rhizome without stolons; utricles broadly ovate or suborbicular, beak short, orifice irregular truncate. |
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390 C. satakeana |
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| 11 (9) |
Female glumes narrowly oblong, purple-brown, margins narrowly white hyaline. |
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391 C. arcatica |
| + |
Female glumes ovate, blackish purple-red, margins broadly white hyaline. |
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392 C. borealihinganica |
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| 12 (8) |
Culms 5.5-8 cm tall; basal leaves gray-green. |
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393 C. taldycola |
| + |
Culms 20-60 cm tall; basal leaves green |
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(13) |
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| 13 (12) |
Basal sheaths purple or blackish purple. |
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394 C. altaica |
| + |
Basal sheaths castaneous-brown |
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(14) |
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| 14 (13) |
Utricles ca. 2.5 mm; nutlets obovate, sessile. |
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395 C. ensifolia |
| + |
Utricles 4-4.5 mm; nutlets oblong, stipitate. |
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396 C. shandanica |
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