CYPERACEvE. (SEDGE FAMILY.; 571 



*- *- Perigijnia large (3" -6" long), and commonly iniic/t inflated, conspicuously 

 nerved, tapering into a conical or long and subulate 2-cleft beak. 



*+ Sterile spike single: styles persistent, contorted: perigynia smooth: spikes 

 many-flowered, (except No. 77). 



70. C. comosa, Boott. Fertile spikes 4, cylindrical, approximate, on 

 exserted nodding peduncles (H'-2i' Ion*;) ; perigynia (2" long) oblong, 

 spreading or reflexed, tapering into a long subulate deeply 2-cleft beak, with 

 bristly, spreading teeth, longer than the awned scale. Swamps, Florida, and 

 northward. Culms stout, 2 -3 high, rough-angled above. Leaves broadly 

 linear, and, like the bracts, exceeding the culm. 



71. C. hystricina, Muhl. Fertile spikes 3, oblong or cylindrical, on 

 nodding peduncles; perigynia oblong-ovate, many-nerved, spreading, taper- 

 ing into a minutely 2-cleft beak, twice as long as the oblong awned scale ; nut 

 obovate, smooth. Swamps, Georgia, and northward. Culms 1 - l high, 

 rough above, shorter than the leaves and bracts. Spikes 1'- \\' long. 



72. C. tentaculata, Muhl. Sterile spike nearly sessile ; fertile spikes 

 1-3, sessile, approximate, or the lowest remote and short-pednncled, ovate or 

 cylindrical-oblong; perigynia ovate, spreading, few-nerved, the long subulate 

 beak cleft on the inner side, and minutely 2-toothed, twice as long as the 

 lanceolate awned scale ; nut ovoid, roughish. Meadows and low grounds, 

 common. Culms 1- 1| high. Leaves and bracts elongated. 



73. C. gigantea, Rudge. Fertile spikes 3-4, oblong or cylindrical; 

 the upper approximate and nearly sessile, the lowest distant and short-pedun- 

 cled, erect ; perigynia (6" - 1" long) widely spreading, strongly many-nerved, 

 tapering from an ovate and obtuse base into a long subulate rough 2-cleft 

 beak, with hispid teeth, twice as long as the oblong awn-pointed scale ; nut 

 depressed, 3-angled. Pine barren ponds, Florida to South Carolina, and 

 westward. Culms 2 high, smooth, shorter than the broad linear leaves 

 and bracts. 



74. C. lupulina, Muhl. Fertile spikes 3-4, approximate, sessile, or 

 the lowest short-peduncled, erect, oblong, thick (!' in diameter); perigynia 

 (6" -1" long) erect-spreading, tapering from the ovoid acutish base into a 

 subulate smooth or slightly roughened beak, with smooth and spreading 

 teeth, twice as long as the oblong awn-pointed scale ; nut rhombic-oblong. 

 Deep river swamps, Florida, and northward. Culms and leaves as in the 

 preceding. 



75. C. Halei, Carey. Sterile spike slender, long-peduncled ; fertile 

 spikes 2-3, remote, ovoid or oblong (I' in diameter), erect, the lowest com- 

 monly on a partly exserted peduncle, the others nearly sessile ; perigynia 

 large (6" long), tapering from a greatly inflated and rounded base into a 

 smooth and slender 2-cleft beak, with smooth and spreading teeth, more than 

 twice as long as the oblong acuminate scale ; nut rhomboid. Swamps, Flor- 

 ida to the mountains of Georgia, and westward. Culms 1 high, smooth and 

 slender, as long as the narrow smooth leaves. Spikes whitish, Y -\\' long. 



76. C. SUbulata, Michx. Sterile spike small; fertile spikes 3-4, re- 

 mote, few-flowered, the lowest on a partly exserted peduncle, erect ; perigynia 



