CYPERACEX. (SEDGE FAMILY.) 517 
contracted into a neck at the base of the short conical-beaked tubercle ; bristles 
4-6, reddish, not longer than the nut.— Sandy sea-shore, West Florida to 
South Carolina. May - Sept. ) — Rhizoma and sheaths black. Culms 6/— 
15' high. Spikes 3/' — 6" long, occasionally 2 -3-cleft. Nut minutely pitted. 
14. E. tricostata, Torr. Rhizoma stout, creeping ; culms nearly terete, 
striate, wiry; spikes cylindrical-oblong, acutish, many-flowered ; scales thin, 
oblong, green on the keel, dark brown on the sides, white on the margins ; nut 
obovate, with strong and rib-like angles, contracted into the minute conical 
tubercle ; bristles none. — Low pine barrens, Florida, and northward. May- 
Sept. 1} — Rhizoma and sheaths pale. Culms 1?9-1j? high. Spikes 2/-4" 
long. Nut very small, minutely wrinkled. 
15. E. tenuis, Schultes. Culms filiform, acutely 4-angled, the sheaths 
purple; spikes elliptical, obtuse or acute, many-flowered ; scales oblong, obtuse, 
green on the keel, dark brown on the sides, white on the margins; nut obovate, 
3-angled, transversely wrinkled and pitted, crowned with the broad depressed 
short-pointed tubercle ; bristles 29 —3, much Shorter than the nut, fugacious. — 
_ Wet places, North Carolina, and northward. — Culms 8'-— 19! high, almost 
bristle-form. Spikes 3-4! long. Nut pale brown. 
. 16. E. microcarpa, Torr. Culms bristle or hair-like, 4-angled ; spikes 
ovate or oblong, obtuse, 10 —many-flowered, often proliferous; scales oblong, 
obtuse or acutish, membranaceous, brownish, with white margins; nut very 
minute, white, obovate, rounded at the apex, and crowned with the depressed 
minutely pointed tubercle ; bristles 3—6, rarely as long as the nut, occasionally 
wanting. 
Var.? filieulmis, Torr. Spikes many-flowered, dark brown; nut obovate- 
oblong, narrowed at the apex, and crowned with the conical 3-angled tubercle ; 
bristles rigid, rather longer than the nut. — Low sandy places, Florida to North 
Carolina, and (the var.) northward, chiefly near the coast. May - Sept. — 
Culms tufted, 3'—9' high. Spikes 1"—2" long. Lowest scale larger and per- 
sistent. Nut strongly 3-angled. 
* 3*3 Spikes thicker than tha éulin: style 2 — 3-cleft : nut lenticular. 
+ Culms 4-angled, bristle-like. DU 
17. E. bicolor, n. sp. Culms erect or procumbent, 4-angled or 4-furrowed ; 
spikes ovate, obtuse, 8 —12-flowered ; scales thin, loosely imbricated, ovate, ob- 
tuse, white on the keel and margins, the sides dark brown; style 2—3-cleft; nut 
Very minute, white, obovate, lenticular, smooth, twice as long as the three fuga- 
cious bristles ; tubercle broadly conical, compressed, one third as long as the 
nut. — Sandy margins of ponds, near Quincy, Florida. Aug. @— Culms 
tufted, 1/— 6! long, when growing in water finely knotted. Spikes 13" long. 
18. E. multiflora, n. sp. Culms tufted, erect, 4-furrowed, the sheaths 
dark brown; spikes ovate or oblong, obtuse, at length very many- (70-100-) 
‘flowered ; scales oval, very obtuse, thin, brown on the sides, white on the mar- 
Bins; stamens 2; style 2-cleft; nut very minute, pear-shaped, compressed, 
| almost truncate at the apex, tipped with the somewhat peltate tubercle; bristles 
