North Amtrican Cyjjeraccte. 359 



D. latitblia, Baldiv.! in Elliott, sk. 1. p. 90; Schult. mant. 2. p. 51; 

 Nutt. gen. 1. p. 3^. 



Rhynchospora lateritia, Baldw. ! Mss. 



Culm 9 — 18 inches 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 joine barrens of the Southern 

 States. Wilmington, North Carolina, Velile !, Nuttall ; com- 

 mon in Mackintosh county, Georgia, and in East Florida, 

 Dr. Baldwin! 



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 

 Floiida 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. 



IB. 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 



