OBDER 154. CYPERACE^E. 375 



T8 C. alp in a Swtz. Spk. 3 or 4, email, oval, close; bract longer than the culm; 

 perig. round-obovate, longer than the black glume. Leaves radical. L. Superior. 



79 C. atratu L. Spk. 36, oblong-ovate, nodding, the lower etalked; perig. 

 round-ovate, shorter than the dark oval glume. Bract long. White Mountains. 



80 C. gracillimo. Schw. Spk. 34. slender, 12 20", rather loose, drooping on long 

 filiform remote stalk*: bract short; perig. oblong, longer than the oblong short- 

 awned glume. 2f. Meadows. 



81 C. formosa Dew. Spk. 3 4, oblong, 8 12 V , on Jong, distant recurved pedun- 

 cles; perig. oblong, inflated, twice longer than the ovate acute glume. Culm 2 3f, 

 bract shorter than the culm. Wet meadows. 



82 C. glabra Boott. ? Spk. short-cylindric (10, spreading on capillary peduncles ; 

 perig. elliptic-oblong, acute at both ends, nerved, twice longer (2") than the ovate 

 brown-edged glume. Very slender, erect, 18'. N. J., N. Y., Penn. 



83 C. Davisii Torr. Spk. 4, 1015" long, rather loose, long-stalked, drooping when 

 ripe ; bract? much longer ; perig. oblong-ovate, nerved, acute, scarce equaling the 

 awned glume. Mass, to Wis., and S. 



84 C. praecox Jacq. $ Spk. clavate, erect; 9 spk. about 2, ovate-oblong, 6 9"; 

 perig. 612, round-ovate, downy, nearly equal to the ovate colored glume (which is 

 brown, edged with white). Culm 36', leafy at base. Rocky hills, E. Mass. 



85 C. Ricliardsoiiii R. Br. $ Spk. clavate-oblong, erect ; $ about 2, oblong, near, 

 suhsessile ; glumes wholly brown ; perig. ovoid-triquetrous, obtuse, nearly beak- 

 less, shorter than the green-midveined glume. 410'. Woods, N. Y. to 111., and N. 



S6 C. vestita Willd. Spk. all sessile, 9", t cylindric, 9 2, ovoid-oblong; perig. 

 ovate, short -beaked, hairy, exceeding the rusty acutish glume. Culm 12 30', sharp- 

 angled, leafy below. Common in wet places. 



8T C. pubesceiis Muhl. Spk. oblong, 812", rather loose, the lowest on a short 

 stalk , perig. lance-ovate, beaked, hairy, exceeding the carinate, mucronate glume. 

 Culm 1020' : leaves downy, flat, 510'. Meadows. 



88 C. nigro-margiiiata Schw. is probably a mere variety of No. 55, having the 

 glume? more extensively colored and the stigmas oftener 3. Hills, Pa., and S. 



89 C. nmbellata Schk. Dwarf; $ spk. erect, 2 3", 9 ovoid, 2 4, each on a sub- 

 radical peduncle, green ; perig. 58, round-ovate, beaked, nearly equaling the lance- 

 aeuminate glume. Leaves 3 5', far longer than the spike. North. 



90 C. limmrnsii Dew. Spikes all sessile, green, i 45", ? 2 3, ovoid ; perig. 

 about 5, globons, beaked, equal to the pointed glumes. Culm filiform, 612', with 

 very narrow leave?. Fields and hills : common. 



91 C. Peiiiisylvanlca Lam. Spikes tawny-red, $ V long, pedunculate, the & 

 email, round, sessile, crowded, about2; perig. round-ovoid, 5 7, downy, short- 

 beaked, equaling the acuminate glume. Culm 412', erect, leaves long. Copses. 



92 C. Novae-Angliae Schw. Spk. purplish, sessile, $ 34", $ 2 I, small, near, 

 (except the lowest), with bracts exceeding the culm; perig. 3 7, pyri form, short- 

 beaked, larger than the ovate glume. Slender, 4 !>'. Open woods. 



93 C. varia Muhl. Spikes rusty-green, sessile, oval, 13, separated, the $ slender, 

 (10") and stalked, bracts very short ; perig. about 7, round-oval, abruptly beaked, 

 about equaling the pointed rusty-edged glume. Erect 8 18, leafy at base. Dry 

 woods. 



94 C. fliva L. $ Spk. oval, approximate, 24; perig. crowded, ovate, ribbed, re- 

 flexed with a long curved beak, longer than the lance-ovate glume. Plant 10 W, 

 yellowish green. Cold, wet soils : common. 



95 C. CEderl Ehrh. 9 Spk. 35, oblong, small (3 5"), close, nearly sessile ; perig. 

 globous, diverging with a short abrupt beak ; plant yellowish, 8 16', leaves and 

 bracts erect. Shores, N. Eng., and West. (C. viridnla MX.) 



96 C. folliculata L. $ Spk. 24, capitate, dense, distant, the lower peduncle 

 exserted; perigynia 4", lanceolate, nerved, tapering into a long beak, diverging, 

 twice longer than the long-awned glumes ; leaves lance -linear. Wet. 



