82 Cyperaceae 
AA.  Pistillate spikes 15 mm. or more long. 
F. Perigynia straw-colored or purple. 
G. Perigynia 3—5 times as long as the scale. W.C. E. (C. exsiccata; C. 
exsiccata globosa.) C. mirata Dew. 
GG.  Perigynia less than twice as long as the scales. 
H. Pistillate spikes |—3 cm. long; perigynium-beak as long as the body. C. 
C. luzulaefolia Boott 
HH.  Pistillate spikes 2.5—-15 cm. long; perigynium-beak about !/7 as long 
as the body. 
I. Leaves 4—14 mm. wide; stem stout; perigynia not conspicuously turgid, 
squarrose. W. C. E. 
C. utriculata Boott 
II. Leaves 2—5 mm. wide; stem slender; perigynia conspicuously turgid, as- 
cending. : 
J. Perigynia straw-colored. C. E. (C. monile pacifica.) 
C. monile Tuck. 
JJ. Perigynia dark-brown. E. 
C. monile colorata Bail. 
FF. Perigynia green or yellow-green. 
K. Perigynia hairy on the angles. W.C. E. (C. frigida of How. FI.) 
C. ablata Bail. 
KK.  Perigynia smooth. 
L. Perigynia 2—3 times as long as the scales, reflexed. E. 
C. retrorsa Schw. 
LL. Perigynia less than twice as long as the scales, erect or ascending. 
M. Stem equaling or exceeded by the leaves; staminate spikes 2—4; pistillate 
scales somewhat purplish. C. 
C. rostrata Stokes 
MM. Stem exceeding the leaves; staminate spike only 1; pistillate scales 
cinnamon-colored with green middle. U. 
C. cinnamomeg, Oln. 
GROUP 5 
A.  Pistillate scales awned. 
B.  Perigynia short-beaked, granulate; pistillate spikes 2.5—-10 cm. long, erect, 
sessile or very short-stalked; terminal spike entirely staminate. W. C. E. 
C. amplifolia Boott 
BB. Perigynia beakless; pistillate spikes 0.8—2 cm. long. 
C. Terminal spike staminate at base only; pistillate spikes erect, sessile or very 
short-stalked; perigynia not granulate, rough on the edges above. C. 
C. fusca All. 
CC. ‘Terminal spike entirely staminate; pistillate spikes drooping, long-stalked; 
perigynia granulate, not rough on the edges. W. C. E. 
C. limosa L. 
AA.  Pistillate scales awnless. 
D.  Pistillate spikes 12—-25 mm. long. 
FE.  Pistillate scales acute, black; perigynia obovoid, beaked; leaves glaucous. E. 
C. reynoldsii Dew. 
EE.  Pistillate scales obtuse or rounded, brown or yellow; perigynia elliptic: or 
ovate. 
F. Leaves glaucous; perigynia beakless; pistillate scales entire. C. 
C. livida Willd. 
— 
Fk ee ee 
neki 
Bt Mowe 
oe) 
