808 CYPERACEAE (Carex. 
Culms reddish, densely tufted, 1-2 ft. Leaves strict, semi- 
terete. Spikelets 4-6, 3-l}in. long. Glumes ee 
Utricles elliptic, plano-convex ; margins serrate . 28. C. Buchanan. 
Culms very short, 1—4 in. Spikelets 4-5, 4-4 in. long, ap- 
proximate, almost concealed by the leaves. Utricles 
narrow elliptic-ovoid, plano-convex, narrowed into a long 
acutely bidentate beak . 29. C. cirrhosa. 
Culms very short, 1-4 in. Spikelets | 4-5, ee in. long, 
closely approximate. Utricles elliptic- ‘ovoid, turgid, 
unequally biconvex ; beak very short He .. 30. C. rubicunda. 
* Styles 3. Nut trigonous. (Styles often 2 in C. Berggreni.) 
+ Utricles glabrous (or the margins serrate above), hardly spreading 
when ripe. 
a. Small species. Culms 1-5in. high, overtopped by the leaves. 
Spikelets 2-4, closely approximate, often concealed by the leaves. 
Reddish. Culms. very short, 3-1d}in. Leaves 1-2in. 
x 7-7, in., linear, flat, obtuse. Utricles elliptic, bicon- 
vex or obscurely trigonous ; margins smooth ; beak short. 
Styles often 2 56 .. 81. C. Berggreni. 
Green. Culms 1-3in. Leaves in. broad, acute. Utricles 
narrow-ovoid, trigonous ; Pao serrate ; beak rather 
long - 32. C. Hectori. 
Glaucous- green. Culms 1-3in. " Leaves 2-6 in. x peues ts, in. 
Utricles broadly ovoid, plano-convex ; margins serrate ; 
beak short 33. C. decurtata. 
Brownish-red or green. Culms 1-5 in. Leaves much 
longer, 3-10 in. x »,-7; in..; tips often curled and 
twisted. Utricles elliptic- oblong, Paige! margins 
smooth ; beak very short .. -- .. 34, C. uncifolia. 
b. Slender; culms 6-16 in. high. Leaves narrow, 35-5 in. broad, 
plano-convex or nearly so. Male spikelets solitary. 
Culms 4-10 in. Leaves usually shorter, narrow. Spikelets 
3-5, distant. Utricles narrow-ovoid, trigonous; margins 
smooth ; beak short . 85. C. Dallii. 
Culms 5-15in. Leaves with broad sheathing bases, tips 
curled and twisted. Glumes pale. Utricles narrow-ovoid, 
unequally biconvex; margins smooth; beak short  .. 36. C. Petriev. 
Culms 6-18 in., filiform. Leaves shorter or longer than 
the culms. Ubtricles elliptic-lanceolate, plano-convex ; 
margins sharply serrate; beak long .. a .. 37. C. comans. 
Culms 4-9in. Leaves much longer, 12-20in. Spike- 
lets 5-6, closely approximate, pale. Utricles elliptic- 
ovoid, unequally biconvex margins smooth; beak rather 
long 38. C. plesiostachys. 
Culms 9-24 in. Spikelets 3-5, short, broad.  Utricles 
broadly ovoid, turgid, biconvex ; margins smooth; beak 
short c se 40 “ic ee .. 39. C. litorosa. 
c. Tall, stowt or slender; culms 1-8 ft. high or more. Leaves 
flat or keeled, 4-4in. broad. Male spikelets usually more than one 
(except in C. dissita). 
Culms stout or slender, 1-24ft. Leaves }-}4in. broad. 
Spikelets 4-8, distant, on short peduncles, the lower 
rarely compound. Male spikelet solitary 26 .. 40. C. dissita. 
