CYPERACEH. (SEDGE FAMILY.) 529 
and ditches, Florida, and northward. July- Sept. — Leaves 1°-2° long. Nut 
and tubercle nearly 1! long. 
2. C. macrostachyus, Gray, var. patulus. Corymbs very large, 
decompound, diffuse; style minutely 2-cleft; nut broadly obovate ; bristles slen- 
der, twice as long as the nut; otherwise like No. 1. — Ponds and ditches, Florida, 
and northward. August. — Culms 39-49 high. Terminal corymbs often 1° 
in diameter. 
3. C. capitatus, n. sp. Culms (ae —8? high) nearly terete, straight, like 
the long narrow erect and channelled leaves; spikes densely clustered in 1-6 
globular heads, the lateral heads long poduactad and somewhat corymbose ; 
scales about 9 (the fourth fertile), whitish ; style very long, minutely 2-cleft ; nut 
obovate, lenticular, obscurely wrinkled, hispid on the margins above, shorter 
than the 6 slender bristles; tubercle bristle-awl-shaped, twice as long as the nut. 
— Pine-barren ponds, Middle and West Florida. June- Aug.— Leaves 2" — 4!! 
wide, as long as the culm, Head composed of 30 or more spikes. Nut and 
tubercle 3!’ long. 
e 
16. CHÆTOSPORA, R. Brown. 
Spikes few- (1 —8-) flowered. Scales imbricated in two rows ; the lower ones 
empty, the upper bearing perfect flowers. Perianth of 3— 6 scabrous or plumose 
bristles. Stamens 3. Style 3-cleft, not dilated at the base, nearly deciduous. 
Nut triangular, mostly pointed by the persistent base of the style. — Leaves 
radical, narrow. Spikes in a terminal cluster, subtended by a 1- 2-leaved in- 
volucre. 
1. C. nigricans, Kunth. Culms tufted, erect, slightly compressed, smooth 
and rigid, jointed near the summit ; leaves rigid, erect, semi-terete, rough on the 
margins, shorter than the culms; sheaths black; involucre 2-leaved, the lowest 
longer than the ovoid dark brown head; spikes ovate-lanceolate, compressed, 
6 -8-flowered ; scales ovate, compressed-keeled, the lowest mucronate; rachis 
zigzag; bristles 6, unequal, compressed, dilated at the base, hispid upward, 
longer than the globose-3-angled white and polished nut. (Schcenusmigricans, 
L.)— Damp soil, near Marianna, West Florida, and salt marshes, near St. 
Mark, Middle Florida. May. 1}— Culms 12-13? high. Although differing 
in some particulars, the Florida plant is probably not distinct from that of the 
entm. henrephere. pie 
17. PSILOCARYA, Torr. 
Spikes wany-flownnd; terete. Scales imbricated in several tows, membrana- 
ceous, all bearing perfect flowers. Perianth none. Stamens 2. Style 2-cleft. 
Nut biconvex, transversely wrinkled, crowned with the persistent base of the 
style. — Culms leafy. Spikes ovate, Speed in spreading lateral and terminal 
corymbs. - 
CS 
1 P. rhynchosporcides, Torr. Calms nearly terete " deat iie: 
