Carex. | LXXXVIIL CYPERACES. 487 
base or ‘at the top of the mixed spikes, as, the stamens having fallen away, 
they then appear like empty glumes. 
Spikelet solitary and terminal , ‘ oo 
1 ‘Spikelets several, the terminal one mixed, the rest female or mixed . + 6 
Spikelets several, the terminal one or more male (rarely with a amen: few | 
female flowers at the base), the others female or mixed 2 ‘ . 23 
Spikelet solitary, terminal. 
9 ; Spikelet wholly male or wholly female ; : ‘ e : ier. 
Spikelet mixed, male at the top, female at the pase ; , - 4 
Male and female spikelets on different plants. “1. O. dioica. 
34, Female spikelet on a long peduncle arising from the pase of the male stem. 
24. C, humilis. 
Spikelet above 6 lines long. Stigmas 2. Fruits tapering to a point, 
2. C. pulicaris. 
Spikelet above 6 lines long. Stigmas 3. Fruits obovoid, obtuse 3. C. rupestris. 
| spite not above 4 lines. Flowersvery few. Stigmas3. Fruit tapering. 
4. C. paucifiora, 
Spikelets several, the terminal one mixed. 
Spikelets all sessile in a simple or branched, close or interrupted ae 
sf Stigmas 2 . - : ‘ : 
Lower spikelets generally stalked. Stigmas Bae ; d : ; ‘ . 20 
6 { Terminal spikelet male at the base. Spike simple . a 
Terminal spikelet-male at the top. Spike often branched or compound »13 
7 one to the lowest spikelet . A 8 
Spikelets very distant, the lower ones each in the axil of a long leafy pract . 12 
{ “spread ovoid, close together. Fruits tapering to a point, erect or ere y 
8 
{one 10 forming a terminal spike without leafy sara or with only a small 
of 
spreading : 
Spikelets, at least the lower ones, at some distance from each other. aa 
9 otal winged at the edges. Stems usually a foot high or more 5. C. lepori ind. 
Fruits not winged. Stems usually 8or9inches high . . 6. C. lagopina. 
Fruits tapering to a point or beak considerably longer than the glume. 11 
10} Frit erect, ovate, with a minute Dont. Stems afoot or more. - Spikelets pale 
reen . 9. C. canescens. 
Ripe spikelets nearly globular, with very spreading beaked fruits. Stem 6 ors 
il inches . . 8. C. steilulata. 
Ripe spikelets oblong, with rather spreading pointed fruits. Stem 1 eo Z feet. 
elongata. 
All the spikelets simple, sessile, and distant . : 10. C. remota. 
124 Lower spikelets branched or 2 or 3 together. Upper ones rather i pe pa 
11 axillaris 
13 3 Stems tufted, without creeping rootstocks . 5 , : - < : . 14 
Rootstock long and creeping. : . 18 
‘Spike compound or branched. Stems 1 to 4 feet (usually 2 to 3 feet) ‘ . 15 
‘Spike simple or the lower spikelets ey, compound. Stems not a foot or 
very slender . - ; é 3 : E = 16 
Spike or panicle dark brown, “rather loose. " Bruits obtusely 3-angled. 
12. C. paniculata. 
‘Spike cylindrical, often green, densely crowded. Fruits much flattened, with 
acute angles. Stemacutely triangular . : - 13. C. vulpina., 
Spikelets near together, in a terminal brown spike about an inch long. 
‘ 14. C, “muricata. 
Lower spikelets distant, all pale brown or green : . : ae i 
Fruiting spikelets globular, no male flowers at their pase . 14. ©. muricata. 
17) Pmuiting spikelets oblong, a = males at the base of some of them. Fruits 
flattened ~~. : . ll. C. avillaris. 
Spikelets rather large, ovoid, in a spike of 1 or2 inches, Fruits with a very 
asf thin or winged edge- . - . 15. C. arenaria. 
Spikelets short, ina spike of about 4 inch. “Fruit very convex, not winged . 19 
pee ovoid, the spikelets distinct. Stem slender, erect . . 16. C, divisa, 
19 { Spike nearly globular, ¥ he dense. Stem short, curving downwards. 
17. C. ineurva, 
