5G6 CYPERACKJE. (SKDOK FAMILY.) 



36. C. aestivalis, M. A. Curtis. Spikes 3-.'), liiicir or filiform, loosely 

 Howereil, onil, ilic lowu.sl (jii nearly e.xserleii jjeduiules, tiio npjior uliiio8t 

 si'ssilu ; peri;»yiiia olilouj^, ohtuseaiigleil, obtuse and entire at the apex, twiie 

 a.s long as the ovale ohtuse or eniarginate scale. — Mcnintains of N(jrtli Caro- 

 lina. — Culms 1°- 1^° high, smooth. Lowest sheaths iiuhesrent. 



37. C. gracillima, Schw. spikes 3-5, distant, linear, on slender and 

 noi'.iling pi'iliinclcs ; perinTnia <ililung, obtuse, entire and obliijue at the ori- 

 fice, about twice as long as the oblong obtuse sliort awned scale. — Wet 

 meadows, North Carolina, and northward. — Culm l°-2° high. Spikes 1'- 

 1^' long, thicker than those of the preceding. Sheaths smooth. 



38. C. Davisii, Schw. & Torr. Spikes 3-4, remote, oblong-cylindrical, 

 all on slcniler nearly exserted peduncles, nodding; jjerigynia ovate-oblong, 

 inflated, round-angled, emarginate at the poiuted apex, longer than the ob- 

 long awned scale. — Mountains of Georgia [Muhlenberg). — Culms I^°-2° 

 high. Leaves and sheaths more or less pubescent. Spikes rather dense- 

 flowered. 



'•>'■'*■ C, miliacea, Muhl. Spikes 4, linear, all on exserted nodding pe- 

 duncles, tlie lerininal one often wholly sterile ; perigynia yellowish, ovate, 

 compressed-3-angled, nerveless or nearly so, tapering into a spreading slightly 

 emarginate point, as long as the oblong mucronate scale, — Mountains of 

 Georgia (Tovreij). — Culms weak, 1°-1^° high. Sheaths smooth. Lower 

 perigynia scattered. 

 * * * Terminal spikes sterile, the others fertile, or with few sterile flowers at the 



sumtnit. 

 ■*- Perigijnia small (l"-3" long), slightlg or not at all injiated, obtuse or short- 

 beaked. 

 -•■+ Fertile sj)ikes sessile, ovoid or oblong, densefiowered : perigynia pubescent, 

 short-beaked or pointed. 



40. C. filiformis, L. Sterile spikes 2 or more, slender, long-ped uncled; 

 fertile spikes 1 -'.i, distant, oblong ; perigynia ovoid, oljtuse, 3-angled, densely 

 pube.scent, obscurely nerved, abruptly contracted into a short emarginate 

 point, longer than the oblong mucronate brown scale. — Bogs and swamps. 

 South Carolina (Torreg). — Culms 2° high, smooth. Leaves filiform, elon- 

 gated. Bracts leafy, many times longer than the spikes. 



41. C. vestita, Willd. Sterile spikes 1 - 2, thick, short-peduncled ; fer- 

 tile spikes 1 -2, approximate, ovoid or oblong; perigynia oblong-ovate, 3- 

 angled, densely-pubescent, strongly nerved, tapering into a distinct beak, with 

 a white membranaceous 2-cleft orifice, longer than tiie oblong mucronate 

 brown scale. — Sandy swamps in tlie upper districts, and northward. — Culms 

 rigid, acute-angled, 1°- 2° high. Leaves short, linear. Bracts short, the upper 

 one shorter than the spikes. 



42. C. dasycarpa, Muhl. Sterile spike single, short-peduncled ; fertile 

 spikes 2-3, approximate, oblong; perigynia woolly, oblong, 3-angled, striate, 

 scarcely beaked, with the orifice entire, twice the length of the ovate barely 

 pointed pale scale ; nut stalked. — Shady woods, Florida to South Carolina. — 

 Culms 6'- 12' high, rough-angled. Leaves pubescent. 



