1	Spikes bisexual or unisexual and bisexual		(2)
+	Spikes unisexual, terminal spike male, lateral spikes female, usually solitary in an involucral bract sheath, rarely 2 or 3 spikes borne in an involucral bract sheath, 1 spike male, 1 or 2 spikes female, rarely with few male flowers at apex		(4)
2 (1)	Spikes bisexual, androgynous, 10-20 or more disposed in a narrow and rather long panicle; utricles laxly hispidulous.		247 C. hirtiutriculata
+	Spikes unisexual and bisexual, terminal spike and terminal spike of partial panicles usually bisexual, androgynous or gynaecandrous, remaining spikes female, sometimes with few male flowers		(3)
3 (2)	Spikes 2 or 3, usually solitary in an involucral bract sheath, terminal spike androgynous, lateral spikes female or sometimes with few male flowers; utricles hispidulous on upper part.		248 C. wutuensis
+	Spikes numerous, disposed in a panicle, terminal spike of partial panicles bisexual, gynaecandrous, remaining spikes female; utricles glabrous.		249 C. fastigiata
4 (1)	Spikes usually 3 borne in an involucral bract sheath, 1 spike male and 2 spikes female, rarely with few male flowers at apex of female spikes, spikes only solitary in lowermost 1 or 2 involucral bract sheaths, 2 male spikes in uppermost, male spikes linear, 3-5.5 cm; female and male glumes purple-brown.		250 C. purpureosquamata
+	Spikes solitary in an involucral bract sheath, terminal spike male, clavate or narrowly lanceolate, not up to 3 cm (only C. finitima with male spike linear, ca. 5 cm), lateral spikes female; female and male glumes brownish yellow or brown-yellow		(5)
5 (4)	Male spike linear, to 5.5 cm, female spikes linear-cylindric, to 12 cm; female glumes ovate, ca. 1/2 length of utricle.		251 C. finitima
+	Male spike clavate or narrowly lanceolate, not up to 3 cm, female spikes cylindric or oblong, 2-6 cm; female glumes oblong, narrowly oblong, ovate-lanceolate, or ovate, ca. 2/3 length of utricle or more		(6)
6 (5)	Female spikes oblong, 2-3.5 cm, loosely 4-6-flowered; female glumes ovate; utricles obovate; nutlets obovate.		252 C. baohuashanica
+	Female spikes cylindric, 3-6 cm, loosely many flowered; female glumes oblong, narrowly oblong, or ovate-lanceolate; utricles narrowly oblong or lanceolate; nutlets narrowly oblong or oblong		(7)
7 (6)	Female glumes ovate-lanceolate; utricles lanceolate, 6-7 mm, glabrous; style longer than utricle.		253 C. bostrychostigma
+	Female glumes oblong or narrowly oblong; utricles narrowly oblong, ca. 4.5 mm, loosely hispidulous on 2 lateral veins and margins of beak; style shorter than utricle.		254 C. deqinensis