CYPERACEiE. 411 



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

 scale. C. Tuckermani Dew. 



Wet grounds. Mass. and N. Y. May ? %.—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 Doott. 



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. ampullacea : sterile spikes 2 — 4, oblong, <?ylindric, erect ; fertile 

 2 — 3, cyhndric, 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. %.—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. Collinsii and 

 Michauxii Dew. 



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

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



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

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

 flated, tapering to a long {)oint, horizontal or diverging, twice as long as the 

 ovate mucronate scale. C. xanthophysa WaJil. 



Swamps. Can. to Flor. July. %. — Culm 2 — 4 feet high, obtusely triangu- 

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



Tall Yellow Sedge. 



57. C. intumcscens 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 times as long as the ovate cuspidate scale. C. foUiculata 

 Schk. 



Wet grounds. N. Y. Mass. Penn. and Ohio. June. %.—Culm \% inchQs 

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



Swollen Sedge. 



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

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

 inflex;ed, nerved, long-rostrate, bicuspidate, much. longer than the ovate or 

 lanceolate scale. 



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

 remote, on a long peduncle, 



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

 pedunculate, distant ; the 3 upper subumbellate. 



