CYPERACE^E. 443 



83. C. aquatilis Wahl. : sterile spikes numerous or one erect, oblong, 

 about 3-sided ; fertile mostly 3, on short peduncles, cylindric, thick - 

 clavate-above, dense flowered, suberect, sometimes sterile at the apex ; 

 fruit elliptic, sublenticular, smooth, with the orifice entire and protrud- 

 ed, about equal to the ovate acutish scale. 



HAB. Bogs. Mass. May. Culm 20 30 inches, erect. Close- 

 ly allied to the preceding, but differs in its larger and thicker 

 densely flowered spikes, in its broader leaves, its almost obtuse 

 angled culm, and lighter colour. 



2. With 3 stigmas. 



84. C. barrattii Schw. 4* Torr. : sterile spikes subgeminate ; fertile 

 about 3, oblong-cylindrical, sterile at the summit, nodding, distant ; 

 fruit oblong, subtriquetrous, somewhat scabrous, orifice subentire ; a 

 little shorter than the ovate lanceolate glumes ; leaves glaucous. 



HAB. Sea coast. N. Y. May. Culm a foot high, rigid. Leaves 

 very smooth and glaucous. Glumes dark brown. 



85. C. trichocarpa Muhl. : sterile spikes 24, pedunculate, (some- 

 times sterile at the summit ;) fertile 3, distant, pedunculate, erect, 

 oblong-cylindrical ; fruit ovate-lanceolate, acuminate, bicuspidate, 

 hairy, longer than the ovate acuminate glume. 



HAB. Swamps. Can. to Geor. May. Culm 3 feet high. Per* 

 tile spikes cylindric, thick. 



86. C. filiformis Linn. : sterile spike geminate ; fertile 2, ovate-ob- 

 long, sessile, distant ; fruit elliptical, villous, bifurcate, as long as the 

 ovate-lanceolate somewhat awned glume ; leaves convolute. 



HAB. Bogs. N. Y. Mass. N. J. 'W. to Mich. Culm 23 

 feet high. Leaves mostly radical, 2 3 feet long, filiform above. 



87. C. vesicaria Linn. : sterile spikes 3 : fertile mostly 2, peduncu- 

 late, cylindrical ; fruit oblong, inflated, acuminate-rostrate, bicuspi- 

 date, longer than the lanceolate glume ; culm acutely triquetrous. 



HAB. Meadows. N. Y. Penn. W. to Mich. May. Culm 2 

 feet high. Spikes dense, 2 3 inches long. 



88. C. ampullacea Willd. : sterile spikes 3 ; fertile 2 3, cylindrical, 

 short pedunculate, erect ; fruit subglobose, inflated, rostrate, bifurcate, 

 longer than the lanceolate glume ; culm obtusely triangular. 



HAB. Meadows. Mass. N. to Arctic Amer. 



89. C. retrorsa Schw. # Torr. : sterile spikos about 3, lower one of- 

 ten fertile at the base ; fertile spikes about 5, approximate, (and clus- 

 tered in a subcorymbose manner,) oblong-cylindrical, inclusely pedun- 

 culate, lowest one often remote ; fruit ovate, inflated, reflexed, ros- 

 trate, half as long as the lanceolate glume. 



HAB. Near ponds. N. Y. and N. Eng. May. Culm 2 feet 

 high. Fertile spikes thick. Fruit large. 



90. C. schiccinitzii Dew. : sterile spikes 2, upper one elongate, pe- 

 dunculate ; fertile 3, oblong- cylindrical, subpendulous, rather remote, 



