North American Cyperaccce. 295 
8. CHiETOCYPERUS, N. ab Escnh. 
Spike comj^ressed, few-flowered; the scales somewhat dis- 
tichously imbricated. Perigynium of 3 — 6 cartilaginous 
retrorsely hispid bristles. Stamens 3. Style 3-cleft ; the 
base bulbous and articulated to the ovary, persistent. Nut 
triangular, crowned with the bulb of the style. Culm slender, 
often procumbent; spikes terminal, solitary, often proliferous. 
Chajtocyperus, N. ah Esenb. in Wight's contrih. pp. 70 and 
95, ^ in Linnaa, 9. p. 289. 
Species of Scirpus, Vahl, Kunth, ^ LcnUi 
Species of Eleocharis, Ram. 4' Schidt, 
Species of Cyperus, RetZi, Willd. 
Ch^tocyperus Baldwinii. 
Spikes ovate, much compressed, proliferous and rooting at 
the base ; scales lanceolate-linear, somewhat obtuse, loose ; 
nut smooth, with prominent angles ; bristles 3- — 4, half the 
length of the nut. 
Scirpus sarmentosus, Baldw. MS. S^ herb ! 
Root fibrous, annual. Culms 5 — 6 inches long, cespitose, of the thick- 
ness of a strong bristle, subterete, sulcate, prostrate and rooting at the 
extremity. Spikes 3 — 8-fio\vered, manifestly distichous, about one third 
of an inch long. Scales somewhat spreading, smooth, slightly keeled; 
Stamens 3; filaments long and slender; anthers oblong. Ovary linear- 
oblong. Bristles scarcely half the length of the nut, and appressed to 
its sides. Sfijle deeply 3-parted ; segments glandularly pubescent. Nut 
oblong, much smaller than the scale, shining, distinctly triangular, with 
the angles prominent and somewhat margined. Tubercle small, white, 
set close on the suinmit of the nut, the base spreading out into three 
lobes which correspond with the angles of the nut ; the apex pointed with 
a short beak. 
Hab. Low wet places. Near St. INIary's, Georgia, Dr^ 
Baldwin ! — Flowers from July to September. 
Obs. This interesting plant is nearly allied to C. setaceus^ 
N. ah E. in LinneEa, 9. p. 289, (C Limnocharis in Wight'' s 
Vol. III. 38 
