916 CYPERACEJE. (SEDGE FAMILY.) 
7. E. simplex, Torr. Culms unequally 3-sided, acute-angled ; spikes 
short, ovate, acute; scales ovate-oblong, whitish, with brownish sides; nut 
obovate, flat on the inner face, twice as long as the conical-beaked compressed 
acute tubercle; bristles rigid. (E. tortilis, Schult. Scirpus simplex, Ell.) — 
Miry places along streams, Florida to North Carolina. May - ept. 3 — 
Culms 19-11? high, very slender, twisted when dry. Spikes 2"-3" long, 
angular, few-flowered. 
8. E. prolifera, Torr. (Cyp. p. 315, not of p. 442). Culms filiform, dif- 
fuse or prostrate, compressed; spikes ovate-lanceolate, acute, proliferous or . 
rooting ; scales whitish, thin, oval, obtuse ; nut obovate, compressed-3-angled ; 
tubercle half as long as the nut, conical, 3-angled, free at the base; bristles 
stout. (E. vivipara, Link.) — Marshy banks of ponds and streams, Florida to 
North Carolina. May- Sept. Y — Culms 10/-20! long, tough and wiry. 
Spikes 2" — 4" long, very rarely fruiting. 
+ + Bristles 4 — 6, longer than the smooth nut. 
9. E. intermedia, Torr. Culms bristle-form, diffuse, furrowed ; spikes 
oblong-ovate, acute, 8- 10-flowered ; scales ovate-lanceolate, rather acute, thin, 
brown on the sides ; nut (yellowish) obovate, narrowed at the base, flat on the 
inner face, beaked with the subulate tubercle; bristles 6, stout, as long as the 
nut and tubercle. — Wet places and in shallow streams, Georgia, and northward. 
.— Culms 3? long. Spikes 2" -3" Jong. Nut minutely striate. E: 
10. E. albida, Torr. Culms terete, spongy; spikes pale, oval or oblong, 
obtuse, many-flowered ; scales rigid, oval, obtuse, white or brownish ; nut broadly 
obovate, whitish, flat on the inner face, smooth and shining; tubercle minute, 
free at the base; bristles 6, reddish, longer than the nut.— Wet sandy places 
along the coast, Florida to South Carolina, and westward. May -~ Sept. Ner 
Rhizoma filiform, creeping. Culms 2/-6/ high. Spikes 2" - 3" long. 
- H. E. rostellata, Torr. Culms compressed, furrowed, wiry; spikes 
ovate-lanceolate, acute, 12 - 20-flowered ; scales rigid, oval, obtuse, light brown ; 
nut obovate, flat on the inner face, tapering into the conical-beaked ; 
bristles 4 —6, stout, twice as long as the nut. — South Carolina, and northward. 
— Culms 1? -13? high. Spikes 3" — 4" long. 
` + + + Bristles 2 — 6, not exceeding the nut, often wanting. 
12. E. melanocarpa, Torr. Culms compressed, furrowed, tongh and 
wiry ; spikes ovate or ovate-oblong, obtuse, many-flowered ; scales thin, ovato» 
obtuse, white on the broad margins; style 2—3-cleft; nut black, ©} " cal, 3- 
angled or biconvex, truncate at the apex, and capped with the. a 
minutely pointed white tubercle ; bristles 3, as long as the nut, sometime Al 
ing. — Pine-barren swamps, Florida, and northward. June- Sept. — 
10-1]° high. Spikes 4” +5” long, 2" thick, occasionally proliferous. — 
_ 13. E. arenicola, Torr. Rhizoma long and creeping; Culms ina 
r cylindrical, obtuse, many-fowered ; scales thin, oblong, obtuse, 
brown at tho — | 
