51(1 CVlM-.HACK.r.. (sr.Dr.K FAMILY.) 



Viir. angUStifolia, lioott Sterile spike lon;^-pc<liin(lcil ; fertile spikes 

 mostlv 3, linear, few-flowered, very remote, the lowest at the base of the culm ; 

 pcri'jynia 4-8, lanccolatc-ohlong, 3-an{,MLcl, alternate and 2-ranked, pointless 

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

 woods, Florulft. — Culms filiform, 8' -12' liigli. Leaves and hraets linear. 

 Lowest sheatlis dark-brown. 



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

 linear-eyliiidrieal, densely niany-flowcred, yellowish, the upper one nearly sessile, 

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

 tracted into a minute mostly recurved entire or emarginatc |)oint, 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-llowcrcd, remote ; perigynia small, oblong- 

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

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

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

 ear. Spikes ^' - 1' long, the lowest long-peduncled. 



45. C. tetanica, Sehk Sterile spike short-pcduncled ; fertile spikes 1 -3, 

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

 base, contracted into a short bent ])oinr, 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 Peri<ii/nia stnoolk (except No. 51), S-nnrjled, icilh a rcciirivd or sprtadivg point : 



lowest peduncles eloiujaUd and often recurved. 



Bracts leafy : scales icliite. 



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

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

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

 mucronate scale. (C. anccps, Willd C. plantaginea, £■//. C. ignota, Dew.) — 

 Plant more or less glaucous. Culm 10' - 15' high, usually comprcsscd-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-flowcred, the 2-3 upper ones commonly approximate; perigynia 

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

 Dew. C. conoidea and C. tetanica, 7?//.) — 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. Styloflexa, Buckley. Sterile spike short-pcduncled ; fertile spikes 

 3, oblong, fcw-flowcrcd, 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 emarginatc beak, longer tlian tlic rjh'ong mucro- 

 nate scale. — Shady swamps, Middle Florida, to 'he mountains of North Caro- 



