162 CYPERACEAE 
diia o 1-2 cm. long, few-flowered: scales few, mostly 6-7 mm. 
long, narrow, obtuse: ns irs much longer Ar the Bn 
often ue as long: achene obovoid, sometimes narrowly so, 2-2.0 m on 
light-brown, the tubercle aaa: about one half as long as as the achens, with 
raised 
Fla. to Ind., Mich., and 
E. elongata Chapm. Perennial, up to 1 m. tall, the scapes terete, often 
producing tufts of very slender scapes: leaf- sheaths usually bladeless: spikelet 
cylindric, 1-2 em. long, rather few-flowered: scales relatively few, 5-6 
long, thinnish, obtuse: perianth-bristles juo than the achen vé. achene obovoid, 
about 1 mm. long, brown, the tubercle barely one half as long as the achene, 
subulate m the ring- ‘like base.—Still water, Coastal Plein, Fla. to La. 
and Tex. (?). 
B. ccida (Reichenb.) Urban. Perennial, 0.5-3 dm. tall, the scapes 
* angled: pes er leaf-sheath with a iens limb: spikelet oval or ov oid, 2—4 
m. long, several-flowered: scales pale-green or rarely white, 2 mm. pun or 
bt 
r the cis : 
void, 1 mm. long or less, dark-brown, the tubercle depressed-eonie. [E. o 
reata Nees.]—(PALE SPIKERUSH.)—Wet soil, Coastal Plain, Fla. to Miss. and 
N. J.—(W m. 
. I., Mex., C. A., 
7. E. praticola Britton. Annual, cm. tall, the x DE bn upper 
leaf-sheaths hyaline, lax: spikelets void Or ellipsoid- ovoid, m. long, ew- 
wered: scales brown, less than 2 mm. long, obtuse or As e E E age: 
ara id shorter than the achene: achene oe obovoid, 0.5 mm. 
lon dark-brown, the tubercle minute, depressed. —Low and wet 
iun: Everglades a and vicinity, Flas —(W. I.) 
8. E. olivacea Torr. Perennial, 0.5-1.5 dm. tall, the id flattened: upper 
omens M a hyaline limb: "Pp uis ovoid, 3-5 mm. lon ng, several-many- 
flowered : reddish-brown D. m. long, searious- margin ned, lax in 
age: Pe: bristles longer t Mr ire ne: achene obovoid, about 1 mm 
long, ag to blackish, the Dd with a saucer-sh aped dn and a min ute 
ip often Mo soil, shores of ponds, various provinces, S. C. to Mich., 
Ont., an nd "Me. 
E. capillacea Kunth. Annual, diminutive, 2-5 cm. tall, the scapes capil- 
lary: d s with scarious blade like tips: spikelet linear- -eylindrie, 2—4.5 
ong, few-flowered: scal -brown or cee dad mostly 2- '3 mm. 
us appres e. perian nth- bristles Ae as long a enes: achene nar- 
rowly oboy oid, 0.5 long ale, the ets slender- oe above 
the ring like base. E ung Pond. d wet 'sand, Coastal Plain, Fla. to N. C. 
—(W. I., Mez., C. A., S. A.) 
10. E. atropurpurea (Reitz.) Kunth. Annual, 3-9 cm. tall, the scapes stiff 
and slender: upper leaf-sheaths with a tooth- like blade: spikelet ovoid, 3—4 
mm. long, papae i Miis scales MEUS purple-brown , except the 
midrib and n scarious mar gins, broad, 1-1.5 mm. long, r r lax in 
age: perianth- “bristles as long a achene or shorter: achene ph. 0.5 5 
mm. long o , jet-black, the E saucer-shaped with a minute tip.— 
Moist soil and a. various provinces, Fla. to Tex., Colo., Ia., and Ga.— 
(W. I., Mez., C. A., S. A., O. W.) 
11. E. caribaea (Rottb.) Blake. Annual, up to 2.5 dm. tall, the Es 
terete: pe leaf-sheath with a tooth-like bla de: spikelet ovoid, 3-5 m . lon 
or smaller, many-flowered: scales thiekish, brown, except the midrib E mar- 
gins, broad, 1.5-2 mm. long, appressed: perianth- -bristles about as long as 
