166 CYPERACEAE 
3. E. capitata (L.) R. Br. Perennial, up to 7 dm. tall, the scapes 4- kr nut 
uds leaf-sheath with a tooth-like blade: pini narrowly ellipsoid, 4—10 m 
long, m poda scales brownish- -purple, e cept the green midrib and ie 
scarious margin 0-2.0 m v. thin ud pup pec i15 as long as 
the achene o ing: dn obo void, about 1 mm. long, ow to brown, 
ae 3- MN Pe oien per ersistent, ps tu ere pene conic or 
disk-like. [E. tenuis (Willd.) ipi -J—(Povinry. GRASS.)—Wet soil, various 
provinces, Fla. to Tex., Man., Ont 
nicola Torr. Perennial, 1-4.5 dm. tall, the scapes slender-wiry: 
ellipsoid, mm. long; PA. seales often brown at the apex, and 
with scarious margins, 2—3 mm. long, thin: pe aaa et "o the longer 
ones often fully as ae as “the achene: achene oid or ellipsoid-obovoid, 
about 1 mm. long, prn faintly RUE the o deltoid or depres ssed. 
—Sandy shores and s wamps, Coastal Plain, Fla. to Tex. and S. C. 
cuminata (Muhl.) Nees. Perennial, up to 5 dm. tall, the scapes flat, 
oarse- us upper oes sheath pre with a tooth- e blade: pics Ov oid 
or ellipsoid, 6-12 g, pagan Pup es e-brown, ept the 
reenish midrib and the Ed pr 2. 25m . long, jr thin- 
nish: perianth-bristles as long as the or shorter: d done obovoid, 1-1.5 
. long, yellowish- bodie Ro hat rm often persistent on the rachis, 
Te “tubercle depressed-c —Wet soil, various provinces, Ga. to La., Wash., 
Man., Ont., and Anticos 
36. E. rostellata D ves uer up to 15 dm. long, the scapes flattened, 
stout sterile ones reclining and rooting at the ae leaf-sheaths without blades, 
15 
Mise oblique mene ellipsoid to fusiform, 6-15 mm. long, several-many- 
red: me ight-brown or green, 3 long, m: perianth- 
bristles M than the achene: achene obovoid or ellipsoid-obovoid, about 
, the tubercle conic-subulate or pyramidal, 15 as long as the 
achene or less and dd with its apex.—Braekish marshes and meadows, 
Coastal Plain and New England Coast, Fla. to Tex. and N. H.; also saline 
places in the interior, and Calif. to B. C. 
10. WEBSTERIA S. Hart Wright. Perennial aquatic, caulescent herbs. 
Stems repeatedly branched. Leaves clustered or whorled at the nodes: blades 
E ilary. Spikelets in often 1 umbel- 
e clusters, 1-flowered, narrow. Scales 2, 
narrow. Flowers perfect. Perianth of 
short, commonly barbed, pale bristles. 
Stamens 3. Styles not swollen, deciduou 
Stigmas 2. Achene er ce ae 
species. | 
W. submersa (Sauv.) Britton. Plant 
submersed, piam stems elongate, the 
internodes 8-25 long, partly sheathed, 
e branches topped by the add of spike- 
u n ng: scales 
nate, the lower ostly 3-vei ned, the 
upper 1-veined: perianth pm longer than 
the achene, tor nthers de subulate, about 3 mm. dd achene 
, 5. A 
obovoid or ‘oval, b 5-9 mm. long.— s and ponds, pen. Fla.—(W. I., S. A.) 
