63. 
4, Stigmas short, stout, strongly twisted or 
contorted, deep red; perigynium abruptly 
contracted into the beak. 
5. Leaf-blades (1.5) 2.5 (3) mm. wide; perigy- 
nia 3.3-4.5 mm. long, 6-20 per spike...... C. convoluta 
5. Leaf-blades 1 (1.75) mm. wide; perigynia 
2.3-3 mm. long, 2-6 per spike. Expected 
(C. radiata). 
2. Perigynia not distended and spongy at the base, 
mostly ascending. 
6. Inflorescence ovoid or oblong-ovoid; spikes 
densely capitate. 
7. Scales much shorter than bodies of the 
perigynia. 
8. Perigynia broadest below the middle, 
round-tapering at the base, with raised 
margins ventrally; beaks long, serrulate.. C. cephalophora 
8. Perigynia broadest at the truncate-cordate 
base, flat ventrally; beaks short, smooth. 
Expected (C. leavenworthii). 
7. Scales slightly shorter to longer than bodies 
of the perigynia. 
9. Culms lax; perigynia faintly nerved 
dorsally. Expected (C. mesochorea). 
9. Culms stiff, erect; perigynia usually 
strongly nerved or ribbed dorsally; stigmas 
MONG SLENGEST cieiccc aisle ele 'ele sieielelersieicicierete eelsiesio Oa MUMLenbengalar. 
var. enervis 
6. Inflorescence oblong or linear-oblong to 
elongate and interrupted; spikes not capitate. 
10. Spikes all aggregated; inflorescence 1.5-4 
cm. long; sheaths concave or convex at 
the mouth. 
11. Scales reddish-brown to purplish-red; 
perigynia few nerved dorsally; sheaths 
not thickened at the mouth. Expected 
(C. spicata). 
