CYPERACE^. 413 



nerved, divaricately bifid at the summit, a little longer tlian the lanceolate 

 awned scale. 



Swamps. Can. to Geor. June. %. — Culm 2 — 3 feet high, thick, rough on 

 the angles. Leaves broad, rough. Cyperus-like Sedge. 



66. C. longirostris Torr. : sterile spikes mostly 3, short ; fertile 2 — 3, 

 cyUndric, loose, at length pendulous, long-pedunculate, rather distant ; peri- 

 gynium globose-ovoid, smooth, with a very long beak, bifid, a Uttle longel 

 than the lanceolate scale. 



Shady places. N. Eng, and N. Y. W. to Mich. Gray. June. %—Culm 

 about 2 feet high, slender, nearly smooth. Leaves bright green and shining. 



Long-beaked Sedge. 



67. C. trichocarpa Mulil. : sterile spikes 2 — 4 ; fertile 2 — 3, distant, pe- 

 dunculate, erect, oblong-cylindric ; perigynium ovoid-conic, acuminate, hi- 

 cuspidate, pubescent, longer than the ovate acuminate scale. 



Swamps. Can. to Geor. June. %. — Culm 2 feet high, rough above. 

 Leaves and sheaths pubescent. Hairy-fruited Sedge. 



68. C aristala Brown : sterile spikes 2 — 4 ; fertile 2 — 4, distant, close- 

 flowered, erect; perigynium ovoid-oblong, somewhat inflated, smooth, long- 

 rostrate, many-nerved, deeply bifid, longer than the oblon.g awned scale. C. 

 mirata Dev:. 



Watertown, Jefferson County, N. Y. British Amer. ; rare. Tmr. Culm 

 2 — 3 feet high, smooth, leafy. Leaves on the under side, and the sheaths pubes- 

 cent. Closely allied to the preceding.^ Awned Sedge. 



•j-j* Perigynium villous, not inj 



69. C. umbellaia Schk. : cespitose ; sterile spike short, erect ; fertile spikes 

 mostly 4, ovoid, few-ftowered ; one sessile at the summit of the culm ; the 

 rest on radical peduncles, subumbellate ; perigynium ovoid, acuminate, ros- 

 trate, subpubescent, as long as the ovate acuminate scale. 



Rocky grounds. N. Eng. IN. Y. and Penn. May. %. — Culm^ in dense 

 tufts, 1—6 inches high. Leaves radical, narrow, rough, longer than the culm. 



Umbelled Sedge. 



70. C varta Muhl. : sterile spike erect, sessiJe or on a short peduncle ; 

 fertile spikes 2 — 3, ovoid, sessile, approximate, few-flowered ; perigynium 

 ovoid or subglobose, acuminate-rostrate, bifid, obtusely triangular, hispidly 

 pubescent, as long as the ovate acuminate scale. C. Emmonsii and col- 

 leda Dew. 



Dry woods. Hudson's Bay to Geor. April. %.. — Culm 8 — 12 inches high, 

 erect, filiform. Leaves pale green, Torrey considers it a variety of the next. 



Variable Sedge. 



71. C. Pennsylvanica Lam.: sterile spike erect, pedunculate, somewhat 

 triangular ; fertile spikes 1 — 3, ovoid, subsessile, subapproximate, few-flow- 

 ered ; perigynium ovoid-globose, short-rostrate, bifid, about as long as the 

 ovate mucronate or acuminate scale. C. marginata Muhl. 



Dry woods. Can. to Car. ; common. April. %.. — Culms growing in tufts, 

 4 — 12 inches high, slender, roiigh above. Leaves short, somewhat glaucous. 



Pennsylvaman Sedge. 



12. C. NovcB-AnglicB Schw. : sterile spike on a short peduncle ; fertile 

 apikes 2 — 3, sessile, ovoid, few-flowered, rather remote ; jjferigynium oblong- 



