416 . CYPERACEiE. 



Wet grounds. Can. to Del. W. to Ohio. May, %.—Culm a foot high, 

 erect or Komewhat decumbent. Leaves subglaucous. Round-fruited Sedge. 



87. C. laxiflora Lam. : sterile spike solitary, subsessile ; fertile spikes 

 mostly 3, rather loose, remote, pedunculate, erect ; perigynium ovoid-oblong, 

 ventricose, obtuse, somewhat shining, longer than the ovate cuspidate 

 scale. 



Moist woods. Can. to Geor. May. % — Culm 12 — 18 inches high, erect, 

 smooth. Leaves deep green, longer than the culm. Loose-flowered Sedge. 



88. C. conoidea Schk. : sterile spike pedunculate ; fertile spikes 2 — 3, ob- 

 long, remote, rather loose, uppermost sessile, the lower on a long peduncle ; 

 perigynium oblong-conic, obtuse, smooth, nerved, subdiverging, entire at the 

 orifice, as long as the ovate subulate scale. C. granularoides Schw. 



Moist woods. Can. to Car. May. — Culm 6 — 12 inches high, angles sca- 

 brous. Leaves shorter than the culrq, bright green. Conical-fruited Sedge. 



89. C. letanica Schk. : sterile spike long-pedunculate ; fertile spikes 2 — 3, 

 oblong-cylindric, loose, the lowest on a long peduncle; perigynium obovoid, 

 smooth, nerved, recurved and entire at the apex, shorter than the ovate 

 acute or mucronate scale. 



Wet meadows. Can. to Car.; rare. ^ay. %. — Culm 6 — 10 inches high, 

 slender, erect. Leaves linear-lanceolate, about as long as the culm, light green. 



Crooked-necked Sedge. 



90. C. oUgocarpa Schk. : sterile spike solitary, pedunculate ; fertile spikes 

 2—3, erect, 3 — 4-flowered, on exserted peduncles; perigynium roundish- 

 triangular, short-rostrate, longer than the ovate mucronate scale. 



Rocky woods. Jiu>. sun's Ba,y to Penii NV. to Ken. ?r!;iy. %. — Culm 

 6—12 inches high, erect. Leaves longer than uie culm, dark t^veen. C. Hitch- 

 cockiana Dew. is a taller variety, with tlie culm and leaves minutely pubescent. 

 Torr. Few-fruited Sedge. 



91. C. digitalis Willd. : sterile spike soUtary ; fertile spikes mostly 3, 

 few-flowered and loose, remote, slender, on long and somewhat cernuous 

 peduncles ; perigynium oblong, triangular, nerved, smooth, short-rostrate, 

 entire at the orifice, longer than the ovate mucronate scale. C. relrocurva 

 Dew. 7 



Rocky woods. Mass. and N. Y. ; rare. May. %. — Culm 6 — 15 inches 

 high,, slender, sharply triangular. Leaves mostly narrow, (sometimes very 

 wide,) light green and subglaucous. Slender Wood Sedge. 



92. C. anceps MiM. : sterile spike solitary, pedunculate ; fertile spikes 

 mostly 3, remote, subcylindric, loosely flowered, lower ones pedunculate ; 

 perigynium oval, triangular, acute, striate, recurved at the apex, nearly en- 

 tire at the orifice, about as long as the ovate cuspidate scale. C. planta- 

 ginea Muhl. 



Woods. Can. to Car. May. %.—Culm 9—18 inches high, somewhat 2- 

 edged above. Leaves very variable ; the radical ones sometimes nearly an inch 

 wide ; those of the culm much narrower. Two-edged Sedge. 



93. C. blanda Dew. : sterile spike solitary, triangular ; fertile spikes 2 — 4, 

 oblong-cylindric, sparse-flowered, the lowest on a long 2-cdged peduncle ; 

 perigynium ovoid, somewhat triangular, nerved, recurved and entire at the 

 apex, a little longer than the ovate mucronate scale. C. conoidea Muhl. 



