544 cyperacejE. (sedge family.) 



subulate, smooth, roflcxcd, the rigid teeth reflexed and appressed to the slender 

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

 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 feu>' 



Jlowered. 



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

 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 7 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. intumeseens, 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-flowered. 

 — Periyynia 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 

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

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

 short and whitish 2-cleft or cmarginatc beak, longer than the oblong acute scale. 



