CYPERACE^. (sedge FAMILY.) 571 



•*- ■*- Perigynia large (3"- 6" long), and commonly much InflaUd, conspicuously 

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



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

 many-Jiowered {except No. 77), 



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

 exserted nodding peduncles (l^'-2i' long); 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. — Swamp.s, 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° - H° high, 

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



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

 1-3, sessile, approximate, or the lowest remote and short-peduncled, 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, lludge. Fertile spikes 3-4, oblong or cylindrical; 

 the upper approximate and nearly sessile, the lowest di.stant and short-pedun- 

 cled, erect ; perigynia (6" - 7" long) widely spreading, strongly many -nerved, 

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

 beak, with hi.^pid 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 tlie broad linear leaves 

 and bracts. 



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

 the lowest short-])eduncled, erect, oblong, thick (1' in diameter); perigynia 

 (6" -7" 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 swamjis, 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 (1' in diameter), erect, the lowest com- 

 monly on a partly e.xserted 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 whitisli, 1'- \V 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 



