562 CYPERACE.E. (SEDGE FAMILY.) 



long as the ovate long-pointed scale. Dry soil, Florida, and northward. 

 Culms 9' -15' high, naked above, rough on the angles, tough and wiry. 

 Leaves narrow. Head \' long. Bracts bristle-like. 



9. C. rosea, Schk., var. radiata, Dew. Spikes2-4, 3-6-flowered, dis 

 taut; perigynia oblong, plano-convex, rough-beaked, spreading at maturity, 

 twice as long as the broadly ovate obtuse or short-mucronate scale. Upper 

 districts, Georgia, and northward. Culms 1 high, smooth, longer than the 

 narrow leaves. Common spike 2* - 3' long. Bract of the lowest spike com- 

 monly exceeding the culm. 



10. C. Texensis, Bailey. Spikes 4 - 5, scattered, few-flowered, all but 

 the uppermost leafy-bracted ; perigynia spreading, lanceolate, spongy at the 

 base, smooth, more than twice longer than the ovate acute scale ; culms very 

 slender, - 1 high, exceeding the tender leaves. Mississippi ( Trace//), and 

 westward. 



11. C. retroflexa, Mnhl. Spikes 4-5, crowded, or the lower ones dis- 

 tinct, ovoid, the lowest short-bracted ; perigynia ovate-lanceolate, smooth- 

 beaked, 2-cleft, at length widely spreading or reflexed, spongy at the base, 

 barely longer than the ovate long-pointed scale. Open woods, Florida, and 

 northward. Culms slender, 1 high, rough-angled above. Leaves narrow, 

 shorter than the culm. Common spike about 1' long. 



* * * S}>ikes with the lower flowers sterile, the upper fertile. 



12. C. Stellulata, Good. Spikes 3-5, obovoid, distinct, the uppermost 

 club-shaped at the base ; perigynia ovate, rounded at the base, tapering into a 

 short and rough 2-cleft beak, finely nerved, spreading and finally recurved, 

 rather longer than the ovate pointed scale. (C. scirpoides, Schk.). Shadv 

 river swamps, Florida, and northward. Culms 6'- 12' high, weak. Leaves 

 narrow and tender. Spikes small. 



Var. sterilis. Sterile and fertile spikes on separate culms, or some of 

 them either sterile or fertile on the same culm, otherwise like the preceding, 

 and growing in similar places. (C sterilis, Willd.) 



Var. COIlferta. Culms taller (2 high) and stouter; spikes larger and 

 more crowded ; perigynia round-ovate, twice as long as the broadly ovate 

 barely pointed scale. Pine barren swamps. 



13. C. canescens, L., var. alpicola, Wahl. Spikes 5 - 7, small, scat- 

 tered, roundish, 6- 10-flowered ; perigynia ovate, plano-convex, short and 

 rough-beaked, spreading and tawny at maturity, rather longer than the ovate 

 acute white scale. High mountains of North Carolina, and northward. 

 Culms weak and slender, 10'- 15' high, longer than the narrow tender leaves. 



14. C. SCOparia, Schk. Spikes 6-8, approximate, ovate or oblong, 

 many-flowered; perigynia oblong-lanceolate, narrowly margined, acute at the 

 base, tapering into a long 2-cleft rough beak, longer than the ovate-lanceolate 

 pointed scale, turning light brown at maturity. Swamps, South Carolina, 

 and northward. Culms l-2 high, rough above, longer than the narrow 

 leaves. 



15. C. tribuloides, Wahl. Spikes 10 or more, crowded in an oblong 

 head, oval or obovate, light green ; perigynia lanceolate, tapering into a mar- 

 gined serrulate beak, nearly twice the length of the obtuse scale. (C. lagopo' 



