394 



CYPERACEyE. 



Carex. 



lines long, much inflated below, tapering to a conical beak above ; the apex moderately bi- 

 cuspidate. Achenium triquetrous, acute at each end, acuminated with the long continuous 

 tortuous style. 



Swamps : common ; the variety in wet mountain meadows, Putnam county (Dr. Barratt). 

 Fl. June. Fr. July. 



52. Carex scaerata, Schwein. Rough-fruited Sedge. 

 Fertile spikes about 5, rather remote, cylindrical, nearly erect, the lower ones on long 



peduncles; perigynia ovoid, acuminate-rostrate, somewhat ventricose, rough, the orifice oblique 

 and slightly 2-toothed, longer than the ciliolale scale. — Schwein. anal. tab. 1. c. ; Dew. Car. 

 I. c. 9. p. 66, and 11. t. K. /. 32 ; Schwein, Torr. Car. I. c. p. 345. t. 26. /. 2 ; Beck, 

 hot. p. 440 ; Kunth, enum. 2. p. 455. 



Culm erect, about a foot and a half high, rather slender, triquetrous, rough on the angles. 

 Leaves very rough, about three lines wide, dark green. Sterile spike solitary, an inch long, 

 pedunculate : scales lanceolate, brown, with a green keel. Fertile spikes mostly 5, seldom 

 so few as 3, and sometimes as many as 6, densely flowered, 1 - 1£ inch long and 2k lines in 

 diameter ; the upper ones somewhat approximate ; the lowest ones distant from one to three 

 inches. Scales about two thirds the length of the perigynium, ovate, slightly ciliate on the 

 margin. Perigynia triangular, strongly nerved, roughened with a short stiff pubescence, acute 

 at the base, spreading when mature, scarcely two lines long ; the beak rather short and 

 pyramidal. Achenium obovoid, triquetrous. 



Wet places, along brooks : frequent. Fl. May. Fr. June. The whole plant is dark green. 



53. Carex Schweinitzii, Dew Schweinitz 's Sedge. 



Sterile spikes usually 2, the lower one often pistillate at the base ; fertile about 3, oblong- 

 cylindrical, somewhat pendulous, rather remote, the peduncles included ; perigynium oblong- 

 ovoid, inflated, acuminate-beaked, bicuspidate at the summit, the peduncle included, about 

 one third longer than the lanceolate-subulate scale. — Dew. in Schwein. anal. tab. I. c, and 

 Car. I. c. 9. p. 68. t. B.f.8; Schwein. $ Torr. Car. I. c. p. 366 ; Beck, bot. p. 443 ; Torr. 

 Cyp. 1. c. p. 422; Kunth, enum. 2. p. 518. 



Culm 12-15 inches high, triquetrous, leafy, rough on the angles above. Leaves 2-3 

 lines wide, taller than the culm, yellowish green. Staminate spikes 1 or 2 inches long, and 

 rather slender ; lower one often fertile below ; the upper sometimes pistillate in the middle : 

 scales lanceolate, acuminate, pale brown. Fertile spikes usually 3, but often 4, somewhat 

 curved, rather densely flowered, 1^-2^ inches long : uppermost one nearly sessile ; the rest 

 on included or partly exserted peduncles. Scales lanceolate, with a long subulate rough point. 

 Perigynia spreading, inflated below, with a long conical-subulate beak, yellowish when mature, 

 smooth, sparingly nerved ; the orifice distinctly 2-toothed. Achenium triquetrous, crowned 

 with the long continuous style. 



Wet meadows ; western counties. Fl May. Fr. June. 



