1	Utricles inflated, red to purplish red.		5 C. baccans
+	Utricles not inflated, pale green to brown		(2)
2 (1)	Utricles ovate-globose, flatly trigonous, 3-3.5 mm, shortly beaked, margins of upper part hairy; female glumes hairy abaxially; persistent sheaths pale brown.		8 C. composita
+	Utricles obovate-lanceolate, obtusely trigonous, 3.5-4 mm, with beak of medium length, margins of upper part scabrid; female glumes glabrous abaxially; persistent sheaths dark brown		(3)
3 (2)	Inflorescence branches few spiked; spikes often single; female glumes pale green, margins membranous and brown.		6 C. myosurus
+	Inflorescence branches many spiked; spikes binate; female glumes brown, margins hyaline.		7 C. eminens