152 CYPERACEAE 
long, often abruptly p rather lax: achene linear-ellipsoid, about 1.5 mm. 
long, abruptly pointed, r 1% as long as the seale.—Pinelands, hammocks, 
mps, and Rue der. Flan —(W. I.) 
48. C. Winkleri Britton & E Plant perennial, tall, often tufted, Light 
green: T ellipsoid, 1-1.5 c E o s linear-subulate , 5-6 
long, mostly 5—6-flowered, stramineous: scales mostly 6 or 7, ovate, 1.5-2 mm. 
long, mae ate: achene BI ellipsoid, slightly over 1 mm. long, a 
pointed, about 25 as long as the scale.—Humbuggus prairie, Dade Co., Fla 
49. C. Plankii Britton. Plant perennial, stouter than C. Torreyi, ae green: 
spikes eerie or ellipsoid-cylindric 1.5-2 cm. long, very dense: spikelets 
subulat e 5-7 mm. long, mostly 4- or O-flowered, sometimes NY met) 
green: scales few, ovate, 2.5-3 mm. long, abruptly pointed: achene ellipsoid’ or 
linear od about 1.5 mm. long, abruptly pointed, fully 15 as long as the 
ale—Low grounds, Coastal Plain and adj. provinces, Miss. to Tex. and Okla. 
50. C. ovularis (Michx.) Torr. Plant perennial, 1-8 dm. tall, often tufted, 
the scape s:nooth: spikelets compactly crowded in globular capitate spikes, 
linear or elliptic, 3-7 mm. long, ‘greenish: scales ovate to ovate-lanceolate or 
lanceolate, the ad nes 3-5 mm. long (7-11 mm. long and spikes larger in 
C. ripis TO c d appr ne ‘achene linear- -ellipsoid or ellipsoid-obovoid, 
2.5 mm. lo dig rely smaller, abruptly pointed, fully 1 as long as the 
scale —Dry fields, pios ond hillsides, various provinces, Fla. to Tex., Kan 
Ill., and N. 
51. C. Nashii 2 c perennial, up to 11 dm. es DR green: spikes 
Fir iim to oval, 1 cm. long or less, dense, often compou pikelets subulate, 
m. long, less [4 1 mm. wide, green or yellowish- Bn pem few, ellip- 
tic-ovate, 2.5-3 m ong, often oci. at the broad apex, appressed: achen 
ellipsoid-linear or PIA D) about 2 mm. long, sone que: shorter than the ae. 
—Pinelands and sandy soil, pen. Fla. 
. globulosus Aubl. Plant perennial, 1-6 dm. tall, often gregarious or 
Ae bright-green: spikelets in rather compact capitate spikes, linear-subu- 
fully 1 mm. wi 
late, 4-8 mm. lon : les few 
ovate-lanceolate, mostly "$4 mm. long, acute, appre achene SEDE 
obovoid or ellips soid, about 1.5 mm. long, abruptly bea at the apex, con 
stricted at the ae fully 15 as long as i scale. [C. echinatus (Ell.) Wood.] 
mo ~ ds id soil, astal Plain and a J: provinces, Fla. 
to , Mo. and Va. —(W. I.)—The Bem C. Grayi Torr. of northern regions 
bns. pn Zoid from the Southern pone but is. erroneously. 
53. C. ligularis L. Plant perennial, up to 13 dm. tall, sometimes clust pier 
glaucous: spikes cylindric or ellipsoid, nee 1-2.5 em. long, den nae sometim 
crowded: cd Aes AN or ovate- Pu. 8-6 mm. long, 1.5-2 mm. wide, gr i 
to green: scales oval, 2-2.5 mm. long, obtuse or do achene 
ellipsoid or seer. d. 5 mm . long or uu SO, pem fully 1 as long as the 
 seale.—Swamps, hammocks, and Ed places, Fla. and coast of Ala.— (W. I., 
Mex., C. A., S. A, O. W.) 
54. C. cayennensis (L.) Britton. Plant po UP to 7 sn T Ridge 
tufted, bc green: spikes cylindric, hue dt . long, d 
nearly and clustered in the involuc Dd ellipsoid or elipsoid ovoid, 
3-5 mm. ju ye po or po chestnut scales ovate to elliptic, 2-3.5 m 
long, mucronate, appressed: ach obovoid, about 2 mm. long, Page diate 
fully 16 as long as the scale, — Fields, ditches, swamps, and waste-places, Missis- 
sippi River delta, La. and Coastal Plain, Tex.—( , C. —A 
plant collected at St. Augustine in 1876 by A. P. Garber has the spikes capitate 
as in this species; but the spikelets are very slender and the achene is linear- 
ellipsoid. 
