224 CYPERACEAE 
leaflike. Scales cuspidate. Perigynium green, round-triangular in cross-sec- 
tion, membranous, from little to rather strongly inflated, several-nerved or 
ribbed, glabrous or hairy, rounded or 
pointed at d the orifice entire or nearly 
so. Achene triangular, pdt jointed 
with the short pu style. Stigmas 3. 
91. Culm 
1.5-6 dm. en on redden ed at base, rough 
1.5-2 
ery rt-pe eduncle 
erect or nearly so, o long- eylindrie, densely 
B. EVE ed, on long, 3-5 mm. 
ick: lowest bra t tw pecans spikes 
ie ee sioner dua the e perigynia, 
the lower cuspidate: perigynium void, 
triangular, 2-2.25 pert = ong, few. nerved, 
? 
beakless, p orifice en [C. virescens (Fl. SE. U. S.) not x bry 
woods and thickets, in acid Or hd ies various provinees, N. rk., 
Wis., and N. S: — Sum. 
92. C. virescens Muhl. Culm 4—10 dm. tall, erect, slender, strongly P 
at p bed bla a E mm. wide, the uppe ermost usua ally '2-3 dm. below 
spikes: S 2-5, lower M least lE dpi ereet or spr n ES 
linear- EN UR sow - 1—4 em. lon ng, 2.5—4 mm. thick: lowest bract 
somewhat exceeding spik cales Perg. han the um gynia, acuminate or 
dde: perigynium o -elliptic to poi oid, triangular, 2-2. m. 
ong, narrowed at each end, several ribbed, Pea at apex but beak- 
less, the orifice entire. [C. costellata Britton.|—Dry wooded e in 
acid soils, various provinces N of Coastal Plain, Ga. io Ky., Ind, and 
Me.— Sum. 
93. C. complanata Torr. Culm 2-6 e Er erect, rather stiff, roughish 
above, strongly reddened at base: leaf-bla 1.5-3 mm. wide, stiff, spreading, 
oe or very nearly so, ps shea abe spikes 2-5, sessile or eas 
0, approximate, oblong, densely-flowered, E d) 6-15 mm. long, 5-7 m 
thick: ica cuspidate, mostly shorter than é perigynia, scarious mar gin a 
p obovoid, flattened, brownish- pee appressed or ase ending, gla- 
s, 2 mm. long, more or less ne Ta dorsally, rounded at apex and beak- 
pe Ao pru eddish. [C. triceps Miehx.]—Dry pine woodlands, in acid soils, 
o Plain and rarely adj. provinces, Fla. to Tex. and S N sT —Spr.—-early 
94. C. hirsutella Mackenzie. Culm 2-9 an tall, beget slender, oo above, 
stron E reddened at base: up blades 1.5—4 m wide, flacci id, softly pu ubes- 
cent as are the sheaths: spikes 2—5, sessile or seen ye so, approximate, oblong 
Or anions D densely lowered the lateral 6-18 mm. long, 5-7 mm. 
thick: se e obtu short eu Dm mostly shorter than the perigynia, 
scarious margin Bede perigyaiun obovoi da E ttened, greenish, appressed or 
Rs. glabrous, 2—2.25 mm. long, st y several- turn dorsally, rounded 
at apex and beakless: onan “yellowis h. g^ hirsuta Muhl.]—Fields and vi 
open aude in calcareous eutral 2 dus provinees, Ala. and M 
to Mo., Mich., and Me eer te zu as 
