358 North American CyperaceeB. 
D. leucocephala, M2V/?.r..'/. 1 p. 37; Vahl, cnum. 2. p. 2i0; Purshi 
ji. \. p. 47; Elliott! ski. 1. p. 89. t. 3. f. 3; Rccm. S^- Schult. syst. 2. p. 
89; Schult. mant. 2. p. 5. 
Dichroma leucocephala, Pers. syn. 1. p. 57; Muhl.! gram. p. 13. 
Scirpus cep'ialotes, Walt. fl. Car. p. 71. 
Rhynchospora ochroleuca, Baldw.! Mss, 
Culm 12 — IS inches high, smooth, slender. Leaves scarcely a line 
■wide, 3 — 6 inches long, with close naked sheaths, somewhat scabrous on 
the margin. Incolucre 4 — 7-leaved ; the leaves dilated and often undu* 
late at the base, spreading, 2 — 4 inches long. Spikes S — 20, compressed, 
whitish, composed of S — 12 scales, most of which are sterile or empty, 
seldom more than three perfecting their fruit. Scales lanceolate, some- 
what compressed, but not carinate, rather obtuse. Stamens always 3; 
anthers linear, very long. Style filiform above the tubercle, slender, 
smooth, cleft about one-third of the waj' down. Nut aemi-o^rate, some- 
what margined, distinctly rugose transversely, brown, a little shining. 
Tubercle gray or brown, compressed, covering the whole summit of the 
nut, but not extending down its edges. 
Hab. Damp soils, North Carolina to Florida. Newbern, 
North Carolina, Mr. Croom ! ; Wilmington to the same State, 
Mr. Curtis! ; South Carolina, Elliott; Macon, Georgia, Dr. 
Loomis! ; Florida, Dr. BahJicin! ; New Orleans, T. Drum- 
mond! — July — October. 
Obs. The Schcemis stellatus of Swartz {prodr. p. 19.) is 
commonly referred to this species, but it differs in the base of 
the involucre being white on both sides, and the tubercle 
straight (not concave) at the base. 
2. DiCHROMENA LATIFOLIA, Bttldw. 
Culm somewhat terete ; leaves broadly linear, slighdy con- 
cave, very long; involucre S — 10-leaved, at length of a reddish 
colour at the base ; nut suborbicular, dull, roughened with 
minute oblong papillae in interrupted lines ; tubercle com- 
pressed, conical, somewhat obtuse, semilunar at the base, with 
the points decurrent on the margin of the nut. 
