572 CYPERACKJE. (SEI)OE FAMILY.) 



4-6, subulate, smooth, reflexed, the rigid teeth reflexed and appreased to the 

 sleiult'i- lieaii, four times aa long as the awu-pointcd scale. — Deep swamps, 

 Geori^ia to Nortli Carolina. — Culms smootli, filiform, 1°- JJ'^ higii, longer 

 than the linear leaves. 



*+ *+ ^Sterile sjiik-e s'ni<jle : sti/le deciduous, slntiijht or /learli/ so : Jertile spikes 



fi ir-ji<)U'tri'il . 



77. C. folliculata, L., van australis, Hailoy. Fertile spikes .3-4, 

 ovoid, remote, 8-10 Howercd, on erect peduncles, sterile at the summit; peri- 

 gynia (6" long) horizontal, lanceolate, tapering into a smootli beak, with erect 

 hispid teeth, one tliird longer than the lanceolate rough-pointed scale — Wet 

 margins of streams, Florida to North Carolina. — Culms smooth, 2" higli, 

 commonly exceeding tiie linear flat leaves. 



78. C. turgeseens, Torr. Fertile spikes 2, near or remote, on short 

 included peduncles, ovoid, 8 - 12-flowered ; perigynia erect-spreading (4" long), 

 lance-ovate, strongly nerved, tapering into a smooth 2-cleft lieak, with liisjjid 

 erect teeth, tAvice as long as the ovate obtuse scale. — Pine barren swamps, 

 Florida to North Carolina. — Culms smooth, 2° -3° high, lunger tiian the nar- 

 row rigid and channelled leaves. 



79. C. £lliottli, Schw. & Torr. Fertile spikes mostly 3, approximate 

 and nearly sessile, or the lowest remote and long-peduncled, globo.-^e, 8-16- 

 flowcred, .sterile at the apex; perigynia small (3" long), oblong-ovate, com- 

 pre.ssed, spreading, few-nerved, ta])ering into a short smooth beak, with erect 

 hispid teetli, twice as long as the ovate obtuse scale. — Boggy margins of 

 pine barren streams, Florida to North Carolina. — Culms l°-2^high, rough 

 above, longer than the narrowly linear leaves. 



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

 upper sessile, the lower peduuded, globose, 10-15-flowered ; perigynia large 

 (6" long), spreading, ta])ering from a rounded and greatly inflated base into 

 a short and smootli 2-cleft beak with hispid teeth, twice as long as the ovate 

 acuminate scale. — Siiady swamps, Florida, and northward. — Culms 1°-1|° 

 higli, rough above, shorter than tlie broadly linear deep green leaves and 

 bracts. 



81. C. Grayii, Carey. Fertile spikes 2, globose, closely 1.5 -30-flowered; 

 perigynia sparsely pubescent (in ours), reflexed; culms tall (2'^- 3° high); 

 otherwise like the last. — Swamps near Rome, Georgia, and northward. 



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

 = Perigynia pubescent. 



82. C. trichocarpa, Mubl. Sterile spikes about three, linear, long- 

 peduncled; fertile sjiikes 2, cylindrical, on short and mostly included pedun- 

 cles; perigynia tliin, rough-hairy, tapering from a rounded ovate base into a 

 rather slender rough beak, with long acute teeth, longer than the oblong acute 

 awnless scale. — Deep marshes, Georgia, and northward. — Culms 2° - 3° high, 

 rough above. Leaves linear, elongated. 



83. C. striata, Michx. Sterile spikes 2-4, long-peduncled; fertile 

 spikes 1 -4 (mostly 2), remote, sessile, or the lowest long-]K'duncled. oblong 

 or cylindrical ; perigynia thick, ovate, pubescent above the middle, contracted 



