410 



CYPERACE^E. 



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

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

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

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



Mountain bogs. 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. aqualilis 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 ; perigynium 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. 1J-. Culm 20 30 inches 

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



Water Sedge. 



48. C. aurca Nutt. : sterile spike solitary, pedunculate ; fertile spikes 

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

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

 orifice, longer than the ovate acute scale. 



Wet rocks. Can. Mass, and N. Y. W to Mich. May, June. 1J- Culm 

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

 mature. Golden Sedge. 



49. C. criniia 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. 7J.. Culm 2 4 feet lu'gh, 

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



Fringed Sedge. 



** Stigmas 3. 

 j- Perigynium inflated^ with a more or less elongated beak. 



50. C. oligosperma Mick.: 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- 

 friana Dew,. 



Borders of lakes. Arct. Amer. N. Eng. and N. Y. June. P 4- Culm 12 

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

 volute. Few-fruited Sedge. 



51. C. bullala Schk. : sterile spikes 23; 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 Dew. 



Wet grounds. Mass. N. Y. Penn. and Ohio. May. 7].. Culm li 2 feet 

 hi<*h, triangular, rough above, leafy. Leaves longer than the culm. 



Inflated Sedge. 



52. C. cylindrica Tuckerm. : sterile spikes 2 3 ; fertile 1 3, remote, 

 cylindric, on short peduncles, erect or inclined ; perigynium ovoid, inflated, 



