408 CYPERACEiE. 



33. C. scoparia Schk : spikclets ovoid, sessile, approximate, aggrcgatCj 

 lowest bracteate ; perigynium ovate-lanceolate, margined, nerved, smooth, 

 bifid, longer than the lanceolate acuminate scale. 



Swamps. Mass. to Car. May. %. — Culm 1 — 2 feet high, triangular, rough 

 above. Leaves long and narrow. Fruit lawny when mature, not winged, 

 9-nerved. Broom-like Sedge. 



34. C. lagopo^ioides Schk. : spikelets 8 — 20, cylindric-ovoid, rathei 

 crowded, alternate and sessile; bract beneath the lowest ojjertopping the 

 culm ; perigynium lanceolate, tapering at both ends, nerved, bidentate, with 

 a narrow serrulate margin, twice as long as the ovate-lanceolate scale. 



Wet meadows. Mass. to Car. May. %. — Culm 1 — 2 or more feet high, fur- 

 rowed. Spikes large, subcylindric when young. Dr. Torrey considers it a 

 variety of the preceding. Hare'sfoot-like Sedge. 



35. C. stram,inea Schk. : spikelets 3 — 15, ovoid, roundish-ovoid or ovoid 

 globose; perigynium ovate or broad-ovate, much compressed, acuminate, 

 with a broad-winged ciliolate-scabrous margin, a little longer than the 

 lanceolate scale. 



Wet meadows and swamps. N. Eng. to Penn. W. to Oliio. May, June. 

 %. — A very variable species, including, according to Dr. Torrey, C.fcmea 

 Muhl. C.festucacea,mirabilis, cristnta and tenera Dew. Stravt-colored Sedge. 



C. Spikes several, (rarely solitary,) all androgynous. Stigmas 3. 



* Staminate at the summit. 



36. C. pedunculaia Muhl. : spikes about 4, on long peduncles, very 

 remote; perigynium obovoid, triquetrous, entire, a little longer than the 

 oblong cuspidate scale. 



Rocky hills. Can. to Penn. ; rare April. %. — Culms 4 — 12 inches high, 

 cespitose, slender. Peduncles mostly radical. Peduncled Sedge. 



** Staminate at the base. 



37. C squarrosa Linn. : spikes 1 — 3, very thick, oblong-cylindric ; peri- 

 gynium ovate, subglobose, long-rostrate, smooth, squarrose, 2-toothed at the 

 summit, longer than the lanceolate scale. C. typhina Mich. 



Bogs. Can. to Geor. W. to Miss. May, June. %..—Culm 2 feet high, tri- 

 angular, rough, leafy. Spike 1 — 2 inches long, and from half to three-fourths 

 of an inch in diameter. Squarrose Sedge. 



D. Spikes several: terminal one androgynous; the others fertile. 

 Stigmas 3. 



38. C. Duxbaumii Wahl. : spikes about 4, obovoid or oblong, rather re- 

 mote ; upper one androgynous and pedunculate ; the rest sessile, with very 

 long bracts ; perigynium elliptic, obtuse, rather compressed, slightly 2- 

 lobed, shorter than the ovate cuspidate scale. 



Sphagnous swamps. N. Eng. and N. Y. W. to Mich. ; rare. May. '1\..—Culm 

 1—2 feet high, leafy at base. Scales chestnut brown. Buxbaum's Sedge. 



39. C. hirsuia Willd. : spikes 3, oblong, approximate ; upper one pedun- 

 culate ; the others nearly sessile and bracteate; perigynium obovate, obtuse, 

 nerved, smooth when mature, entire at the orifice, about as long as the 

 ovate acuminate scale. C. triceps Mich. 



