CYPERACE^E. 411 



conic-rostrate, 2-forked, smooth, about twice as long as the ovate-lanceolate 

 cale. C. Tuckermani Dew. 



Wet grounds. Mass, and N. Y. May ? f l\.. Culm about 2 feet high, tri- 

 angular, leafy, rough above. Leaves narrow, longer than the culm. 



Cylindrical Sedge. 



53. C. vesicaria Linn. : sterile spikes about 3, erect, oblong ; fertile 

 mostly 2, cylindric, erect, long-bracteate ; perigynium oblong-conic, inflated, 

 rostrate, nerved, bicuspidate, nearly twice as long as the oblong-lanceolate 

 scale. C. utriculata Boott. 



Meadows. Mass, and N. Y. to Del. W. to Mich. May. Culm 2 feet high, 

 shorter than the leaves, acutely triangular. Plant bright green. 



Bladder Sedge. 



54. C. amputtacea : sterile spikes 2 4, oblong, cylindric, erect ; fertile 

 2 3, cylindric, erect, close-flowered, short-pedunculate ; perigynium sub- 

 globose, inflated, diverging, rostrate, bifurcate, longer than the lanceolate 

 scale. 



Marshes. Arct. Amer. to Mass, and N. Y. 'Ij.. Culm 2 3 feet high, ob- 

 tusely triangular. Leaves light green. Perhaps identical with the preceding. 



Bottle-like Sedge. 



55. C. subulata Mich. : sterile spike solitary, short-pedunculate ; fertile 

 spikes mostly 3 4, sessile, or with included peduncles, very remote, few- 

 flowered, sparingly staminate at the top ; perigynium subulate, reflexed, 

 bifid at the orifice, longer than the lanceolate scale. C. CoUinsii and 

 Michauxii Dew. 



Cedar swamps. Long Island, N. Y. and N. J. June. 1\.. Culm 1 2 feet 

 high, almost filiform, leafy. Leaves deep green. Awl-fruited Sedge. 



56. C. follicvlata Linn. : sterile spike solitary; fertile spikes 2 4, ovoid, 

 distant, few-flowered, pedunculate; peryginium oblong-conic, somewhat in- 

 flated, tapering to a long point, horizontal or diverging, twice as long as the 

 ovate mucronate scale. C. xanthophysa WoM. 



Swamps. Can. to Flor. July. r i\- Culm 2 4 feet high, obtusely triangu- 

 lar, leafy. Leaves flat, smooth. " Plant pale green, at length yellow. 



Tall Yellow Sedge. 



57. C. intumescens Rudge : sterile spike oblong, pedunculate; fertile 

 spikes 1 3, roundish, approximate, few-flowered, upper one sessile, lower 

 on a short peduncle ; perigynium ovoid, acuminate-rostrate, much inflated, 

 diverging, three tunes as long as the ovate cuspidate scale. C.folliculata 

 ScJA. 



Wet grounds. N. Y. Mass. Penn. and Ohio. June. 7J.. Culm 18 inches 

 high, triangular, smooth. Leaves broad-linear, rough on the margin. 



Swollen Sedge. 



58. C. lupulina MuJd. : sterile spike on a short peduncle ; fertile spikes 3, 

 ovoid-oblong, approximate ; bracts very long and leafy ; perigynium ovoid, 

 inflexed, nerved, long-rostrate, bicuspidate, much longer than the ovate or 

 lanceolate scale. 



var. 1. polystachya Torr.: fertile spikes 5, oblong-cylrndrio ; lowest one 

 remote, on a long peduncle. 



var. 2. pedunculate, Gray : fertile spikes all pedunculate ; the lower long- 

 pedunculate, distant ; the 3 upper subumbellate. 



