540 CYPERACE.E. (SEDGE FAMILY.) 



Var. angustifolia, Boott. Sterile spike long-peduncled ; fertile spikes 

 mostly 3, linear, few-flowered, very remote, the lowest at the base of the eulm ; 

 perigynia 4-8, lanceolate-oblong, 3-angled, alternate and 2-rankcd, pointless 

 and entire at the apex, longer than the ovate rough-awned scale. — Dry open 

 woods, Florida. — Culms filiform, 8' -12' high. Leaves and bracts linear. 

 Lowest sheaths dark -brown. 



43. C. granularis, Muhl. Sterile spike short, sessile; fertile spikes 3-4, 

 linear-cylindrical, densely many-flowered, yellowish, the upper one nearly sessile, 

 the lowest distant and long-pedunclcd ; perygynia small, globose-ovate, con- 

 tracted into a minute mostly recurved entire or cmarginate point, longer than 

 the ovate obtuse or barely pointed scale. — Meadows and banks of streams, 

 Florida, and northward. — Culms 6' -12' high. Leaves and bracts broadly 

 linear, 3-nerved. 



44. C. COnoidea, Schk. Sterile spike long-peduncled ; fertile spikes 2-3, 

 oblong or cylindrical, densely many-flowered, remote ; perigynia small, oblong- 

 ovoid, obtuse, striate Avith impressed nerves, smooth and shining, equalling or 

 the lower shorter than the ovate pointed or short-awned scale. — Mountains of 

 North Carolina, and northward. — Culms 6'- 12' high. Leaves and bracts lin- 

 ear. Spikes £' - %' long, the lowest long-pedunclcd. 



45. C. tetanica, Schk Sterile spike short-ped uncled ; fertile spikes 1 -3, 

 linear-cylindrical, remote, loosely flowered ; perigynia obovate, narrowed at the 

 base, contracted into a short bent point, longer than the ovate acute or short- 

 awned scale. — Mountains of North Carolina, and northward. — Culms 1° high. 

 Leaves and bracts narrowly linear. 



t t Perigynia smooth {except No. 51), 3-angled, with a recurved or spreading point : 



lowest peduncles elongated and often recurved. 



Bracts leafy : scales white. 



46. C. laxiflora, Lam. Sterile spike pedunclcd, exceeding the bracts; 

 fertile spikes 2-3, remote, linear, loosely 8-12-flowcred ; perigynia oblong- 

 obovate, tapering into a smooth spreading entire beak, longer than the oblong 

 mucronate scale. (C. anccps, Willd. C. plantaginca, EU. C. ignota, Dew.) — 

 Plant more or less glaucous. Culm 10'- 15' high, usually compressed-3-angled 

 above. Leaves linear or lanceolate, tender. Sheaths smooth. 



Var. striatula. Culms, leaves, and especially the sheaths, rough ; sterile 

 spike sessile or nearly so, shorter than the bracts ; fertile spikes 3 - 5, rather 

 closely 12-20-flowered, the 2-3 upper ones commonly approximate; perigynia 

 obovate, abruptly short and bent-pointed. (C. striatula, Michx. C. blanda, 

 Dew. C. conoidca and C. tetanica, Ell.) — Dry open woods and margins of 

 fields, Florida, and northward ; common, and varying greatly in the form of the 

 perigynia and width of the leaves. 



47. C. stylofiexa, Buckley. Sterile spike short-pcduncled ; fertile spikes 

 3, oblong, few-flowered, very remote, the lowest on a long and mostly nodding 

 peduncle ; perigynia lanceolate or oblong, narrowed at the base, tapering into a 

 spreading rough-angled mostly cmarginate beak, longer than the ob'ong mucro- 

 nate scale. — Shady swamps, Middle Florida, to *!ic mountains of North Caro- 



