344 CYPEKACEJE. (SEDGE FAMILY.) 



subulate, smooth, rcflexed, the rigid teeth reflexed and oppressed to the slender 

 beak, 4 times as long as the awn-pointed scale. Deep swamps, Fayetteville, 

 North Carolina (Curtis), and northward. Culms smooth, filiform, 1-1| 

 high, longer than the linear leaves. 



** * Sterile spike single; style deciduous, straight or nearly so: fertile spikes few- 

 Jlowered. 



67. C. folliculata, L. Fertile spikes 3-4, ovoid, remote, 8- 10-flowcred, 

 on erect peduncles, sterile at the summit ; perigynia (6" long) horizontal, lance- 

 olate, tapering into a smooth beak, with erect hispid teeth, one third longer than 

 the lanceolate rough-pointed scale. Wet margins of streams, Florida, and 

 northward. Culms smooth, 2 high, commonly exceeding the linear and flat 

 leaves. 



68. C. turgescens, Torr. Fertile spikes 2, near or remote, on short in- 

 cluded peduncles, ovoid, 8-12-flowered; perigynia erect-spreading (4'' long), 

 lance-ovate, strongly nerved, tapering into a smooth 2-cleft beak, with hispid erect 

 teeth, twice as long as the ovate obtuse scale. Pine-barren swamps, Florida to 

 North Carolina. Culms smooth, 2 -3 high, longer than the narrow rigid 

 and channelled leaves. 



69. C. Elliottii, Schw. & Torr. Fertile spikes mostly 3, approximate and 

 nearly sessile, or the lowest remote and long-peduncled, globose, 8- 16-flowered, 

 Sterile at the apex ; perigynia small (3" long), oblong-ovate, compressed, spread- 

 ing, few-nerved, tapering into a short smooth beak, with erect hispid teeth, twice 

 as long as the ovate obtuse scale. (C. Castanea, Ell.) Boggy margins of pine- 

 barren streams, Florida to North Carolina. Culms l-2 high, rough above, 

 longer than the narrowly linear leaves. 



70. C. intumescens, Rudge. Fertile spikes 2-4, approximate, the up- 

 per sessile, the lower peduncled, globose, 10-15 flowered; perigynia large (6'' 

 long), spreading, tapering from a rounded and greatly inflated base into a short 

 and smooth 2-cleft beak with hispid teeth, twice as long as the ovate acuminate 

 scale. (C. folliculata, Ell.) Shady swamps, Florida, and northward. Culms 

 1- l high, rough above, shorter than the broadly linear deep-green leaves and 

 bracts. 



-* ++ -!- Sterile spikes 2 or more: fertile spikes many -Jlowered. 

 Perigynia pubescent. 



71. C. trichocarpa, Muhl. Sterile spikes about three, linear, long-pedun- 

 cled ; fertile spikes 2, cylindrical, on short and mostly included peduncles ; peri- 

 gynia thin, rough-hairy, tapering from a rounded ovate base into a rather slender 

 rough beak, with long and spiny teeth, longer than the oblong acute awnless 

 scale. Deep marshes, Georgia, and northward. Culms 2 -3 high, rough 

 above. Leaves linear, elongated. 



72. C. Striata, Michx. Sterile spikes 2-4, long-peduncled ; fertile spikes 

 1-4 (mostly 2), remote, sessile, or the lowest long-peduncled, oblong or cylin- 

 drical ; perigynia thick, ovate, pubescent above the middle, contracted into a 

 hort and whitish 2-cleft or emarginate beak, longer than the oblong acute scale. 



