Nwth A)aerlcan Cyperacece. 359 
D. latifolia, Baldw. ! in Elliott, sk. 1. p. 90; Schult. mant. 2. p. 51; 
Nutt. gen. 1. p. 32. 
Rhj'nchospora lateritia, Baldw. ! Mss. 
Culm 9 — 18 inohes high, generally much thicker than in the preced- 
ing species, slightly compressed, but scarcely angular. Leaves often 
overtopping the culm ; those towards the base longer than the others, 
2 — 3 lines wide; the radical ones short, numerous. Involucre at first 
whitish, at length of a dull red colour; the leaflets 3 — 4 lines wide, taper- 
ing to a long sharp point. Spikes 8 — 12, in a subglobose head. Scales 
whitish, ovate, rather obtuse. Stamens always 3. Style filiform, smooth, 
2-cleft one-third of the way down. Nut (exclusive of the tubercle) some- 
what orbicular in the outline, of a pale brown colour, a little roughened 
with linear-oblong papillae placed in irregular longitudinal lines, and 
marked also with exceedingly narrow transverse wrinkles. Tubercle 
blackish, with a broad concave base, its horns embracing the edges of 
the nut and extending downward. 
Hab. Margin of ponds in low pine barrens of the Southern 
States. Wihnington, North Carolina, Delild, Nuttall', com- 
mon in Mackintosh county, Georgia, and in East Florida, 
Dr. Baldiviii! 
Obs. Easily distinguished from the preceding species by 
its thicker culm and numerous involucral leaves which turn 
reddish when old, or in drying. 
D. ciliata is said by Vahl and Pursh to be a native of 
Florida and Georgia, but I have never seen a North American 
Dichromena with the leaves ciliate at the base, and I greatly 
doubt whether the species has been found in this country. 
No such plant is noticed by Elliott, Muhlenberg or Baldwin. 
16. PSILOCARYA. 
Flowers perfect. Spikes many-flowered. Scales im- 
bricated on all sides, membranaceous or chartaceous, all 
fertile. Perigynium 0. Stamens 2 ; filaments long and per- 
VoL. III. 46 
