CYPERACE^E. 459 



HAB. Swamps. Can. to Geor. June. 11. Cldm 18 inche* 

 higli. Spikes 6 10-flowered. Plant dark green. 



56. C. zanthophysa Wahl. : fertile spikes 34, ovate, very remote, 

 pedunculate, few-flowered ; fruit oblong- conical, somewhat inflated, 

 striate, horizontal when mature, acute, bifid, longer than the ovate 

 acuminate-glume. 



HAB. Swamps. N. Y. to Car. June. Culm 24 feet high, 

 slender, leafy. Fruit 1-2 inch long, tapering into a long acute 

 point. Plant at length yellow- green. 



57. C. subulata Mich* : sterile spikes short-pedunculate ; fertile 

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

 ed, sterile at the apex ; fruit subulate, reflexed, much longer than the 

 lanceolate glume ; culm very slender. 



HAB. Cedar swamps. N. J. July. Culm 2 feet or more high. 

 Spikes 3 5-flowered. Fruit with a long slender beak. 



58. C. alpcstris All. : fertile spikes 3, 5-flowered, the 2 uppermost 

 approximate and sessile, the lowest radical, on a long peduncle ; fruit 

 obovate-oblong, triquetrous, scarcely rostrate, subpubescent, orifice 

 oblique, as long as the oblong- glume. 



HAB. Woody hills. Mass. Culm 6 inches high. 



59. C. collecta Dew. : sterile spike solitary, erect, loosely imbricate, 

 slender, subpeduncled ; fertile spikes mostly in threes, ovate, few-flow- 

 ered, bracted ; lower one on a short peduncle ; fruit ovate, beaked, 

 sub-bidentate, somewhat pubescent, longer than the ovate acute scale. 



HAB. Bogs. Mass. May. Culm 6- 10 inches high, procum- 

 bent when mature. Plant light green. Allied to C. nova anglicr., 

 but differs in number of stigmas and in other characters. From 

 C. varia it differs in its staminate spike, its manner of growth, 

 scale, and in its fruit being more ovate, &c. 



Pistilliferous spikes on exsert peduncles, partly sheathed at the base. 



60. C. atta Hanke. : sterile spike pedunculate ; fertile 2 3, pedun- 

 culate, about 5-flowered ; fruit obovate, with a short rostrum, obliquely 

 truncate ; sheath at the base of the culm hyaline, leafless. 



HAB. Limestone hills. N. H. and Ver. June. Culm 4 10' 

 inches high, filiform, sulcate. Bracts ovate, white. Fruit black 

 when mature. 



61. C. plantaginea Lam. : fertile spikes mostly 4, on peduncle* 

 scarcely exserted, loosely flowered ; fruit oblong-cuneiform, trique- 

 trous, recurved at the apex ; culm sheathed at the apex ; sheaths of 

 the culm all leafless, (coloured ;) leaves broad. 



HAB. Mountain woods. N. Y. Mass, and Penn. April, May. 

 Culm 8 12 inches high, nearly leafless, with purple sheaths. 

 Glumes dark brown. 



62. C. anceps Muhl. : fertile spikes mostly 3, remote, subcylindric, 

 toosely flowered, lower ones pedunculate ; fruit ovate, triangular, 



