410 CYPERACEiE. 



46. C. cespUosa Linn. : sterile spikes solitary or sometimes 2, cylindric- 

 oblong; fertile mostly 3, cylindric, obtuse, distant, the lower on a short 

 cxsert peduncle ; perigynium ovoid or oval, somewhat acute, smooth, mostly 

 longer than the oblong obtuse blackish scale. C. concolor Brown. 



Mountain bo^. Can. to Penn. May. Culm 12 — 18 inches high, slightly - 

 rough above. Leaves light green, flat. Fertile scales nearly black. 



Smaller Bog Sedge. 



47. C. aquatilis Wahl. : sterile spikes 1 — 4, erect, oblong ; fertile mostly 

 3, on short peduncles, cylindric, thick-clavate above, dense-flowered, sub- 

 erect, sometimes sterile at the apex ; perigyryura elliptic, sublenticular, 

 smooth, with the orifice entire and protruded, about equal to the ovate 

 acutish scale. 



Marshes and wet places. Mass. and N. Y. June. %. — Culm 20 — 30 inches 

 high, triangular, nearly smooth. Leaves smoothish, pale green and glaucous. 



Water Sedge. 



48. C aurea Null. : sterile spike solitary, pedunculate ; fertile spikes 

 3 — 4, oblong, loose-flowered, subpendulous, rather approximate, lower ones 

 pedunculate ; perigynium obovoid or pyriform, obtuse, nerved, entire at the 

 orifice, longer than the ovate acute scale. 



Wet rocks. Can. Mass. and N. Y. W to Mich. May, June. %—Culm 

 4 — 10 inches high, subprocumbent, slender. Perigynium orange-yellow when 

 mature. Golden Sedge. 



49. C. crinita Lam. : sterile spikes one or more, lax oblong, sometimes 

 with a few fertile flowers ; fertile spikes 4 — 5, dense, distant ; perigynium 

 roundish-ovoid, ventricose, slightly rostrate, entire at the orifice, much 

 shorter than the oblong scabrous awned scale. C. paleacea Wahl. 



Swamps and meadows. Can. to Geor. June. I^.—Culm 2 — 4 feet liigh, 

 triangular, rough. Leaves pale green. Fertile spikes 2 — 3 inches long. 



Fringed Sedge. 



** Stigmas 3. 



•f- Perigynium inflated, with a more or less elongated beaTc. 



50. C. oligosperma Mich. : sterile spike mostly solitary, slender, peduncu- 

 late; fertile spikes 1 — 3, ovoid, sessile, distant, bracteate, few-flowered; 

 perigynium ovoid, somewhat inflated, acute, nerved, short-rostrate, entire 

 at the orifice, smooth, a little longer than the ovate acute scale, C. Oake- 

 siana Dew. * 



Borders of lakes. Arct. Amer. N. Eng. and N. Y. June. %.—Culm 1—2 

 feet high, triangular, rough above. Leaves linear, hght green, at length in- 

 volute. Few-fruited Sedge. 



51. C. hdlata Schk. : sterile. spikes 2—3; fertile mostly 2, oblong-cylin- 

 dric, rather loose, exsertly pedunculate and somewhat nodding, distant; 

 perigynium globose-ovoid, inflated, erect, smooth, costate, rostrate-acumi- 

 nate, twice as long as the lanceolate scale. C. monile Deio. 



Wet grounds. Mass. N. Y. Penn. and Ohio. 3Iay. %.—Cvlm U— 2^ feet 

 high, triangular, rough above, leafy. Leaves longer than the culm. 

 "^ ' ^ ^ Inflated Sedge. 



,52. C. cylind-rica TucJcerm.: sterile spikes 2—3; fertile 1—3, remote, 

 cyUndric, on short peduncles, erect or inclined ; perigynium ovoid, inflated. 



