CYPERACE^. (sedge FAMILY.) 565 



29. C. Stenolepis, Torr. Spikes 4-7, the terminal one sniaU, often 

 wholly sterile or fertile, the others cylindrical, erect, dense-flowered, the upper 

 ones approximate and nearly sessile, the lower scattered, on exserted pedun 

 cles ; perii^ynia horizontal, contracted into a long and slender 2-cleft beak, 

 shorter than the awn-like scales. — Swamps and meadows, upper districts of 

 Georgia, and westward. — Culms 1°- 1J° high, flexuous above, shorter than 

 the broad leaves and bracts. 



-1 — f-Peri(ji/nia beakless. 



++ Spikes approximate, ovoid or cylindrical, dense-flowered, sessile, or on short 

 and erect peduncles : bracts short. 



30. C. Buxbaumii, Wahl. Spikes 3-4, oblong, the upper one pedun- 

 cled, the others sessile or nearly so; perigynia whitish, smooth, elliptical, 

 compressed-3-angled, obtuse and emarginate at the apex, commonly shorter 

 than the ovate acute or awn-pointed blackish scale. — ]Mouutains of Georgia, 

 and northward. — Culms l°-l^° high, rougli above, longer than the narrow 

 glaucous leaves. 



31. C. triceps, Michx. Spikes 2-4 (mostly 3), sessile or nearly so, 

 ovoid or oblong, many-flowered ; perigynia pubescent or at length smoothish, 

 ovate, compressed-3-angled, strongly nerved, obtuse and emarginate at the 

 apex, about as long as the oblong mucronate white scale. — 1 )anip soil, Florida, 

 and northward. — Culms erect 1°-1^° high, rough angled, and, like the nar- 

 row leaves, and sheaths, more or less pubescent. 



32. C. Smithii, Porter. Spikes 3-4, ovoid or oblong, sessile, few-flow- 

 ered ; perigynia smooth, round-pear-shaped, obscurely angled, faintly nerved, 

 contracted into a short and entire point, as long as the oblong obtuse or barely 

 pointed white scale — Low ground, in the upper districts. — Culms 1° high, 

 very slender. Leaves and sheaths smooth. 



33. C. virescens, Muhl. Spikes 2-3, cylindrical, short-peduncled, 

 densely manj^-flowered ; perigynia small, pubescent, ovoid, strongly nerved, 

 3-angled, acute and entire at the apex, as long as the ovate mucronate white 

 scale. — Low grassy meadows, North Carolina, and northward. — Culms 1°- 

 2° high, rough. Leaves and sheaths hairy. 



34. C. Shortiana, Dew. Spikes 4-5, approximate, erect, cylindrical, 

 densely many-flowered, the lower stalked, all staminate at the base ; perigynia 

 round-obovate, nerveless, about the length of the thin ovate scale ; culms 

 rigidly erect, mostly shorter than the broadly linear leaves. — Damp ground, 

 Tennessee, and northward. — Culms 1° -3° high. Spikes 1' long. 



*+ ++ Spikes remote, linear or cylindrical, rather loosely flowered, on lonfj and 

 mostly droopinfj peduncles : bi-acts long and leaf-like: perigynia smooth, some- 

 what inflated, few and faintly nerved. 



3.5. C. OXylepis, Torr. & Hook. Spikes 4 - .5, linear, all on long bristle- 

 like partly included nodding peduncles, distant ; perigynia oblong, acute- 

 angled, emarginate at the pointed apex, longer than the lanceolate rough- 

 pointed white scale. — Low ground, Florida, and westward. — Culms slender, 

 j^o_20 high, tlie lower part, like the leaves and sheaths, pubescent. 



