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| 1 |
Spikes bisexual, androgynous, or terminal spike male, lateral spikes bisexual |
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(2) |
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Spikes unisexual, terminal spike male, with few female flowers at base or apex in rare species, lateral spikes female |
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(7) |
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| 2 (1) |
Terminal spike male, lateral spikes bisexual; utricles 5-7 mm, distinctly veined |
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(3) |
| + |
Spikes bisexual, androgynous; utricles 3-4 mm, inconspicuously veined |
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(4) |
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| 3 (2) |
Leaf blades 2-3 mm wide; terminal spike male or sometimes with few female flowers; female glumes ovate-oblong, 3.5-4 mm, apex mucronate; utricles 5-6 mm, stramineous, red-fuscous punctate; nutlets broadly elliptic, fuscous. |
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236 C. spachiana |
| + |
Leaf blades 3-5 mm wide; terminal 1 or 2 spikes male; female glumes ovate, ca. 2.5 mm (except length of arista), apex long aristate; utricles 6-7 mm, stramineous, shiny; nutlets oblong, pale yellow. |
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237 C. nitidiutriculata |
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| 4 (2) |
Spikes arranged in loose or dense panicles |
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(5) |
| + |
Spike single in an involucral bract sheath, not arranged in a panicle |
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(6) |
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| 5 (4) |
Spikes numerous, female part subequal to or longer than male part, male parts oblong or ovoid; glumes patent; utricles estipitate; nutlets dark brown. |
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232 C. neopolycephala |
| + |
Spikes 10 or more, female part much longer than male part, male parts linear; glumes not patent; utricles shortly stipitate; nutlets brownish yellow. |
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233 C. shuangbaiensis |
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| 6 (4) |
Culms slender, 25-45 cm tall; leaves shortly sheathed, blades 1.5-2 mm wide; spikes 2 or 3, 1-3 cm; utricles ca. 3 mm. |
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234 C. aristatisquamata |
| + |
Culms robust, 50-60 cm; leaves long sheathed, clothing lower part of culm up to 15 cm tall, blades 4-5 mm wide; spikes 7-10, 2-5 cm, sometimes ramose at base, female spikes sometimes with several male flowers; utricles ca. 4 mm. |
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235 C. wenshanensis |
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| 7 (1) |
Male spike sometimes with few female flowers at base or apex; utricles emarginate at orifice |
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(8) |
| + |
Male spike without female flowers; utricles rather long 2-toothed at orifice |
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(9) |
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| 8 (7) |
Female spikes oblong-cylindric, 3-4 mm wide; utricles ca. 3.5 mm. |
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238 C. yunnanensis |
| + |
Female spikes oblong, 7-8 mm wide; utricles 4.5-5 mm. |
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239 C. magnoutriculata |
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| 9 (7) |
Utricles obtusely trigonous, not inflated, 4-6 mm |
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(10) |
| + |
Utricles inflated trigonous, 5-7 mm |
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(12) |
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| 10 (9) |
Utricles obovate or broadly elliptic, thinly leathery, 5-6 mm. |
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246 C. zekogensis |
| + |
Utricles narrowly ovate or narrowly oblong, papery or membranous, 4-4.5 mm |
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(11) |
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| 11 (10) |
Male spikes 3-6, borne at apex of culm; female spike with several to 10 or more utricles; utricles glabrous. |
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244 C. tangii |
| + |
Male spike 1, terminal; female spikes with many utricles; utricles hispid. |
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245 C. sutchuensis |
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| 12 (9) |
Female spikes usually 2 or 3 in an involucral bract sheath; female glumes pale, ca. 3 mm, earlier deciduous than utricles; utricles horizontally patent at maturity. |
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240 C. jiuxianshanensis |
| + |
Female spikes usually single in an involucral bract sheath; female glumes yellowish brown, 3.5-4 mm, not early deciduous; utricles obliquely patent at maturity |
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(13) |
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| 13 (12) |
Terminal spike gynaecandrous, rarely male; utricles red-brown punctate; nutlets elliptic. |
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243 C. metallica |
| + |
Uppermost 1-3 spikes male; utricles not red-brown punctate; nutlets obovate |
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(14) |
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| 14 (13) |
Male spike 1; lower involucral bracts with short sheath. |
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242 C. minquinensis |
| + |
Male spikes 2 or 3; lower involucral bracts sheathless. |
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241 C. arnellii |
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