CYPEEACEiE. (SEDGE FAMILY.) 517 



contracted into a neck at the base of the short couical-beaked tubercle ; bristles 

 4-6, reddish, not longer than the nut. — Sandy sea-shore. West Florida to 

 South Carolina. May -Sept. 1]. — Rhizoma and sheaths Mack. Culms 6'- 

 15' high. Spikes 3" -6" long, occasionally 2- 3-clef(. Nut minutely pitted. 



14. E. tricostata, Torr. Ehizoma 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. 11. — Rhizoma and sheaths pale. Culms 1°- 1^° high. Spikes 2" -4" 

 long. Nut very small, minutely wrinkled. 



15. E. tenuis, Schultcs. 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 tlie broad depressed 

 short-pointed tubercle ; bristles 2-3, much shorter than the nut, fugacious. — 

 Wot places. North Carolina, and northward. — Culms 8' -12' high, almost 

 bristle-form. Spikes 3" -4" long. Nut pale brown. 



16. E. microearpa, Torr. Culms bristle or hair-like, 4-angIed; 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. ? filiculmis, 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 l"-2" long. Lowest scale larger and per- 

 sistent. Nut strongly 3-angled. 



* * * Spikes thicker than the culm : style 2 - Z-cleft : nut lenticular. 

 H- Culms i-angled, bristle-like. 



17. E. bicolor, n. sp. Culms erect or procumbent, 4-angled or 4-fuiTowed ; 

 spikes ovate, obtuse, 8 - 1 2-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 fT — Culms 

 tufted, l'-6' long, when growing in water finely knotted. Spikes Ij" 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, veiy obtuse, thin, brown on the sides, white on the mar- 

 gins ; stamens 2 ; style 2-cleft ; nut very minute, pear-shaped, compressed, 

 almost truncate at the apex, tipped with the somewhat peltate tubercle ; bristles 



44 



