1	Male part of spike developed, longer than to equaling female part, sometimes a little shorter than female part at flowering, but overtopping next lower utricle at maturity		(2)
+	Male part of spike less developed, much shorter than female part, not overtopping next lower utricle at maturity		(4)
2 (1)	Female glumes mucronate at apex; utricles ovate-elliptic, ca. 3 mm, tapering above to a beak ca. 1 mm.		465 C. litorhyncha
+	Female glumes obtuse at apex; utricles broadly ovate, elliptic-ovate, or lanceolate-ovate, 1.5-3 mm, tapering above to a beak less than 1 mm		(3)
3 (2)	Utricles broadly ovate to elliptic-ovate, 1.5-2.5 mm.		466 C. rara
+	Utricles lanceolate-ovate, 2.5-3 mm.		467 C. capillacea
4 (1)	Stipe of utricle ca. 0.8 mm.		468 C. stipitiutriculata
+	Utricle estipitate (only C. uda with very short stipe)		(5)
5 (4)	Utricles oblong-lanceolate, 3.5-4 mm		(6)
+	Utricles broadly ovate or elliptic to ovate-oblong, 2-3 mm		(7)
6 (5)	Leaf blades 2-3 mm wide; utricles horizontally patent or reflexed at maturity.		469 C. uda
+	Leaf blades ca. 0.3 mm wide, hairlike; utricles suberect at maturity.		470 C. austro-occidentalis
7 (5)	Utricles nearly beakless.		471 C. dahurica
+	Utricles shortly beaked		(8)
8 (7)	Leaf blades flat, 1-1.5 mm wide; utricles 2.5-3 mm.		472 C. onoei
+	Leaf blades hairlike, 0.5-0.8 mm wide; utricles ca. 2 mm.		473 C. kirinensis