146 CYPERACEAE 
C. densus Link. Plant annual, pe tufted, up to 7 dm. tall, bright- 
De spikelets clustered, sometimes densely so, linear to lanceolate, 5-9 m 
ab 
long, straw-colored or yellowis sh- green: scales thinnish, ovate, about 2 mm. long, 
D d sometimes loosely so: achene oval or ellipsoid- obovate, oo 
lm , % as long as the scale, brown.—Ditches and moist gron und, or som 
ins EDUC Coastal Plain, Fla. to Tex.—(W. I., Mex., C. 2 A.) 
5. C. filicinus Vahl. Plant annual, tufted, up to 3 dm. tall, hee n) green: 
T s rather loosely clustered, linear to linear-lanceolate, 9-30 m long, 
inly yellowish-brown: scales firm, o vate or pan ombie, D 3m 
a mucronulate, pf appres d achene obov or narrowly eae, 
nearly 1.5 mm. long, obtuse or truncate at the apex, enr -brown, 15 as long as 
the scale or near ly so.—The plant of the Southern States has narr ower spike- 
lets and narrower achenes. (C. Nuttall ul n ty and braekish eV 
and low grounds, Coastal Plain and New England Coast, Fla. to Miss. and 
Me.—(W. I.) 
C. microdontus Torr. Plant annual, tufted, up to 7 dm. tall, e 
green: T d linear, often narrowly so, 6-18 mm. long, yellowi 
thin about 1.5 m 
ong or rarely nearly 2 mm. lon d 
Es notched, or Pus pointed, rather loosely ic achene we 
abo , mueronulate, grayis ly % as pu as the seale.—Moist 
and N. J. 
ou 
to wet Sond, Coastal Plain and adj. pr ovinces, Fla. to Tex. 
C. paniculatus Rottb. sree m tufted, up to 6 dm. tall, ae green: 
j lus 
pale a undi scales tee firm, elliptic to ovate, 1.0—2 mm. on o 
rarely longer, mucron e: achene ellipsoid- obovate, ee 1 mm. long, mu- 
eronulate, about 15 as long as the scale, grayish. [C. Gatesi A o 
yer and springy places, Coastal Plain and adj. Doc. Fla. to Tex., 
and Va.—(W. I., Mez., C. A., 8. A.) 
8. C. odoratus L. Plant annual, tufted, up to 9 dm. - pale- iis de 
crowded, linear-laneeolate to narrowly linear r, 6-20 lon y-bro 
straw colored: scales ovate, 1.5-2 mm. long, mu cronulate, appressed: “achene 
s D or nearly so, often COT at the base, about ong, rounded 
the apex, over 15 as long as the scale, grayis ish. [C. polystachqo Rottb, aa 
Ditches and low gr as Coastal Plain, Fla. to Tex.—(W. I., 
W.) 
C. pumilus L. Plant annual, edel inu pu m A dm. tall, pale-green: 
p orowded, sometimes loos ely so, lin ong, silvery-gray: 
scales ovate, 1.5 mm. long, ct ees eel poe sed: achene obo- 
vate, about 0.5 mm. long, truneate and mucronulate at the apex, less than K 
as lon ng as the scale.—Sandy, often wet soil, Coastal Plain, Fla. and Ala. 
(W. I, 0. W.) 
10. ©. sabulosus Mart. & Schrad. Plant annual, sometimes o up to z 
dm. tall, often T green: spikelets densely clustered, - 8-20 m 
long, ye ellowi sh-brown: scales oval or suborbicular, punit 1.0 m e tr ae 
i s pe appres essed: pue a nearly m. long, mucronate, black, 
ong as the scale or nearly s [C. flavicomus Vahl|—Moist to wet sandy 
aail Coasa Plain, Fla. to Tex. por Va. 
11. C. piis dd L. Plant RAE rs or as tae up to 4 dm. tall, 
light-green: bracts of the invo nequa only oe and 
elongate, erect or ee S0: ee crowded, pie zy ina js gle h oblong- 
ovate to elliptic or linear, 6-15 mm. long, nut, or merely v B1 s 
ehestnut: seales deltoid- ovate, nearly 2 mm. ur obtuse or acutish, oe. 
