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| 1 |
Female spikes oblong, not surpassing 2.5 cm; utricles subcorky, thick, with slightly concave or indistinct veins |
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(2) |
| + |
Female spikes cylindric; utricles subleathery or leathery, with convex veins |
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(6) |
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| 2 (1) |
Female glumes orbicular-ovate, apex mucronate; utricles ovoid, 3-4 mm, indistinctly veined; nutlets broadly obovate or broadly elliptic. |
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363 C. heterostachya |
| + |
Female glumes broadly ovate or ovate, apex muticous (only C. melanostachya and C. subpumila with aristate or mucronate apex); utricles oblong or ovate, 5-8.5 mm, distinctly or slightly concave veined; nutlets oblong or obovate |
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(3) |
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| 3 (2) |
Female glumes broadly ovate, 5.5-6 mm; utricles 6-8.5 mm, with distinct veins, not concave |
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(4) |
| + |
Female glumes ovate, 3.5-4.5 mm; utricles ca. 5 mm, with slightly concave veins |
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(5) |
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| 4 (3) |
Utricles oblong-elliptic, 6-8.5 mm; nutlets oblong, 4-5.5 mm. |
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364 C. scabrifolia |
| + |
Utricles ovate, 6-6.5 mm; nutlets obovate, ca. 3 mm. |
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365 C. pumila |
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| 5 (3) |
Female glumes mucronate at apex; utricles narrowly elliptic or oblong; nutlets narrowly elliptic, ca. 4 mm. |
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366 C. subpumila |
| + |
Female glumes aristate at apex; utricles ovate; nutlets obovate, ca. 2 mm. |
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367 C. melanostachya |
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| 6 (1) |
Male spikes 3-6, sometimes lower male spike with few female flowers at base. |
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356 C. riparia |
| + |
Male spikes 1 or 2, rarely 3, without female flowers at base |
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(7) |
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| 7 (6) |
Female glumes lanceolate, apex mucronate; utricles oblong or oblong-lanceolate, 6-7 mm |
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(8) |
| + |
Female glumes ovate or broadly ovate, apex muticous or mucronate; utricles oblong-ovate, ovate, or broadly ovate, 4-5(-5.5) mm |
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(9) |
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| 8 (7) |
Utricles oblong, stramineous, usually dark red flecked, veins indistinct. |
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357 C. argyi |
| + |
Utricles lanceolate or oblong-lanceolate, olivaceous or brownish green, veins distinct. |
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358 C. kirganica |
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| 9 (7) |
Female glumes broadly ovate, apex obtuse, mucronate; utricles elliptic or ovate-elliptic, 5-6 mm, brownish green, emarginate at orifice. |
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359 C. rugulosa |
| + |
Female glumes ovate, apex acuminate or acute, muticous or mucronate; utricles broadly ovate or ovate, ca. 4 mm, stramineous, brown or brown-red flecked, 2-toothed at orifice |
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(10) |
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| 10 (9) |
Female glumes acute at apex, mucronate; utricles ovate, obtusely trigonous, teeth divergent at orifice. |
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360 C. gotoi |
| + |
Female glumes acuminate at apex, muticous; utricles broadly ovate, inflated trigonous, teeth strict at orifice |
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(11) |
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| 11 (10) |
Utricles orange or stramineous, usually brown flecked, with distinct veins. |
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361 C. songorica |
| + |
Utricles stramineous, without brown flecks, veins indistinct. |
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362 C. tangiana |
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