45 
female; scales brown; achene obtusely triangular, somewhat com- 
pressed, oblong or lanceolate with long beak. 
Am.: Port Clarence (!), West Greenl. c. 64°—73° (!), East Greenl. 
CHK) 7302040) 
Geogr. area: Northern North America, North Europe, The Alps, 
Caucasus. 
A. One terminal spike. Oa GEN 
a. Dioecious. 
ly QUES Be WUC IMS oo obs Ol od pee) ooro Grae C. scirpoidea (136). 
DeeSticmasea g utc clemglabrouss.qeiaacm-Melciics rue caren nCmcn C. dioica (113). 
b. Monoecious. 
1. Stigmas 3. 
* The axis of the female flower exserted beyond the utricle 
C. microglochin (148). 
= The axis mot exserted or wanting’... 2 2 in... - C. rupestris (140). 
2. Stigmas 2. 
mes pikemmalesatethewbAascarcn tcl cwelu-ielld Cileiiel <li n C. ursina (112). 
** Spike male at the summit. 
Ge Sihatdieross so bo slo oo nO oe oo 6 crore alone C. dioica (113). 
8. Czespitose. 
+ Spike globose, utricles broader than the scales C. capitata (99). 
+7 Spike ovate, utricles narrower than the scales C. nardina (98). 
B. Spikelets sessile, androgynous (at least some of them), stigmas 2. 
a. Male and female flowers variously mixed in the spikelets C. siccata (108). 
b. Male flowers at the summit of the spikelets. 
1. Utricle strongly nerved, abruptly tapering in the beak C. chordorrhiza (102). 
2. Utricle faintly nerved, continuously tapering in the beak. 
* Leaves flat or plicate, scabrous in the margins, beak two-toothed, 
utriclesfainthyenenvedteyice.wiememalerarsaet a nee C. stenophylla (101). 
*® Leaves involute, smooth in the margins, beak oblique, utricle nearly 
MLELVElESSH tee. Ware HEW ore sty tne che Shc Ls erences C. incurva (100). 
c. Male flowers at the base of the spikelets. 
1. Utricles with a membranous winged margin. 
* Spikelets aggregated in a globose head, scales dark-brown, utricles 
Gbovates brow De seu. waht eer cracls C. Macloviana (105). 
** Spikelets remote, scales light-brown, utricles lanceolate-ovate, gree- 
SOS ATTN Og She Ooo oO aio oln.b oo co Bond o C. pratensis (104). 
2. Utricles without membranous winged margin. 
* Spikelets dark-brown, utricles brown, with short, but distinct beak 
(except C. ursina). 
a. Densely cespitose, growing on sea-shores. 
+ Utricles with short beak, distinctly nerved C. glareosa (111). 
++ Utricles without beak, nearly nerveless .... C. ursina (112). 
8. Loosely czespitose with ascending shoots, utricles nerveless or 
faintly nerved, not growing on sea-shores. 
+ Leaves plicate, glaucous; mostly male flowers at the bases of 
allithesspikeletsy-parucr-me me tenet aeren C. heleonastes (109). 
++ Leaves flat, green; male flowers only at the base of the ter- 
Dinalespikele tapes eon elim ee memredten cae C. lagopina (110). 
