CYPERACE^. (sedge familv.) 543 



■1- Pen'gynia large (3"- 6'' long), and commonly much inflated (except Nos. 60 

 and 61), conspicuousti/ nerved, tapering into a conical or long and subulate 2-cleJl 

 beak. 



•* Sterile spike single: stgles persistent, contorted: periggnia smooth: spikes mang- 

 Jlowered (except No. 66), 



60. C. COmosa, Boott. Fertile spikes 4, cylindrical, apijroximate, on ex- 

 serted nodding peduncles {lJ'-2^' long) : perigynia (2" long) oblong, spreading 

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

 ing teeth, longer than the awned scale. (C. furcata, Ell.) — Swamps, Georgia, 

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

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



61. C. hystricina, Muhl. Fertile spikes 3, oblong or cylindrical, on nod- 

 ding peduncles ; perigynia oblong-ovate, many-nerved, spreading, tapering into 

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

 smooth. — Swamps, Georgia, and northward. — Culms 1°-1^° high, rough 

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



62. C. tentaculata, Muhl. Sterile spike nearly sessile ; fertile spikes I - 

 3, sessile, approximate, or the lowest remote and short-peduncled, ovate or cylin- 

 drical-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, Florida, and 

 northward. — Culms 1° - 1^° high. Leaves and bracts elongated. 



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

 npper approximate and nearly sessile, the lowest distant and short-peduncled. 

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

 ing 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. 



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

 lowest short-peduncled, erect, oblong, thick ( r in diameter); perigynia (6'- 7" 

 long) erect-spreading, tapering from the ovoid acutish base into a subulate smooth 

 or sUghtly roughened beak, with smooth and spreading teeth, twice as long as 

 the oblong awn-pointed scale ; nut rhombic-oblong. — Deep river-swamps, Flori- 

 da, and northward. — Culms and leaves as in the preceding. 



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

 2-3, remote, ovoid or oblong (1' in diameter), erect, the lowest commonly 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 ob- 

 long acuminate scale ; nut rhomboid. — Banks of the Apalachicola River, Florida, 

 and westward. — Culms 1" high, smooth and slender, as long as the narrow 

 smooth leaves. Spikes whitish, 1'- 1^' long. 



66. C. SUbulata, Michx. Sterile spike small ; fertile spikes 3 - 4, remote, 

 few-flowered, the lowest on a partly exserted peduncle, erect ; perigynia 4-6, 



