1	Involucral bracts usually not sheathed or lowermost very shortly sheathed; utricles 3-4 mm, densely hispidulous (C. glabrescens with utricles up to 6 mm, laxly pilose), with 2 short to medium-sized teeth; nutlets tightly enveloped in utricle		(2)
+	Involucral bracts usually sheathed; utricles 5-10 mm, laxly pubescent or glabrous (C. wui with utricles densely hirsute), long 2-toothed; nutlets rather loosely enveloped in utricle		(6)
2 (1)	Male spike single, terminal, distanced from uppermost female spike by up to 15 cm, upper female spikes subsessile, lower ones very shortly pedunculate; female glumes ovate, mucronate.		375 C. filipedunculata
+	Male spikes 2 or 3, sometimes 4, borne at top of culm, rather shortly pedunculate, female spikes usually pedunculate, rarely upper ones subsessile; female glumes ovate-lanceolate, narrowly ovate, or lanceolate, aristate or mucronate		(3)
3 (2)	Leaf blades 1-2 mm wide, slightly involute on margins; female glumes lanceolate or oblong-ovate, acuminate at apex, longer than or equaling utricle; utricles with short beak, veins indistinct.		376 C. lasiocarpa
+	Leaf blades 3-5 mm wide, flat; female glumes ovate-lanceolate or narrowly ovate, mucronate or aristate at apex, usually shorter than (excluding awn) utricle; utricles with medium-sized beak, several veins distinct		(4)
4 (3)	Female glumes narrowly ovate; utricles broadly ovate or ovate, 5-6 mm, laxly hispidulous.		377 C. glabrescens
+	Female glumes ovate-lanceolate; utricles oblong-ovate, 3-4 mm, densely hispidulous		(5)
5 (4)	Culms stout; leaves stiff; female spikes densely many flowered; utricles with short beak, long 2-toothed at orifice.		378 C. fedia
+	Culms slender; leaves soft; female spikes graduate flowered from laxly at base to densely many flowered above; utricles with rather long beak, shortly 2-toothed at orifice.		379 C. miyabei
6 (1)	Male spike single and terminal, distant uppermost female spike near; lowermost involucral bract shortly sheathed, sheath not exceeding 1 cm		(7)
+	Male spikes 2-5, distant uppermost female spike far; lowermost involucral bract rather long sheathed, sheath usually exceeding 1 cm		(8)
7 (6)	Female glumes ovate-lanceolate, long aristate at apex, dark purple-red laterally, laxly hirsute; utricles broadly ovate, red-brown, densely hirsute, with 2 medium-sized teeth at orifice.		380 C. wui
+	Female glumes broadly ovate, mucronate at apex, stramineous laterally, glabrous or ciliate only at apex; utricles oblong-ovate, yellow-green, glabrous, with 2 short teeth at orifice.		381 C. latisquamea
8 (6)	Utricles laxly hispidulous or ciliate on beak margins		(9)
+	Utricles glabrous		(10)
9 (8)	Leaves 4-6 mm wide, glabrous; lower involucral bracts longer than inflorescence, upper involucral bracts shorter than inflorescence; spikes 5-7, female spikes 3-5 cm; utricles 5-7 mm, ciliate on beak margins.		386 C. drymophila
+	Leaves 2-3 mm wide, laxly hispidulous on both surfaces; involucral bracts shorter than inflorescence; spikes usually 4, female spikes 2-2.8 cm; utricles 4-5.6 mm, hispidulous.		387 C. hirticaulis
10 (8)	Utricles oblong-lanceolate, 8-10 mm, leathery, obliquely truncate at orifice, teeth unequal.		382 C. raddei
+	Utricles ovate or oblong-ovate, 5-8 mm, subleathery or herbaceous, not obliquely truncate at orifice, teeth of equal length		(11)
11 (10)	Stigmas 2; nutlets biconvex.		385 C. humida
+	Stigmas 3; nutlets trigonous		(12)
12 (11)	Leaves glabrous at abaxial surface; utricles ovate, 6-7 mm, thinly leathery, stramineous, teeth rather short and strict, not divergent.		383 C. orthostachys
+	Leaves pubescent at abaxial surface; utricles broadly ovate, 7-8(-10) mm, herbaceous, greenish, teeth rather long, divergent.		384 C. eriophylla