538 CYPERACE^. (sedge FAMILY.) 



*+ *+ Spikes remote, linear or cylindrical, rather loosely fowered, on hncj and mostly 

 drooping ]/cduiicles : bracts long and leaj'-like : perigynia siiioulh, somewhat injlated, 

 few and faintly nerved. 



31. C. oxylepis, Ton-. & Hook. Spikes 4 -5, linear, all on long bristle- 

 like partly iiuUuicd nodding peduncles, distant; perigynia oblong, acute-angled, 

 emarginatc at the pointed apex, longer than the lanceolate rough-pointed whiie 

 scale. — Low ground, Florida, and westward. — Culms slender, 1^°- 2° high, 

 tlic lower luirt, like the leaves and sheaths, pubescent. 



32. C. aestivalis, M.A.Curtis. Spikes 3-5, linear or filiform, loosely 

 flowered, erect, the lowest on nearly exscrted peduncles, the upper almost sessile ; 

 perigynia ohlong, obtuse-angled, obtuse and entire at the apex, twice as long as 

 the ovate obtuse or emarginatc scale. — Mountains of North Caiolina, and north- 

 ward. — Culms 1° - li° high, smooth. Lowest sheaths pul)eseent. 



33. C. graeillima, Schw. Spikes 3-5, distant, linear, on slender and 

 nodding peduncles ; perigynia oblong, obtuse, entire and oblique at the orifice, 

 about twice as long as the oblong. obtuse short-awned scale. — Wet meadows. 

 North Carolina, and northward. — Culm l°-2° high. Spikes I'-l^' long, 

 thicker than those of the preceding. Sheaths smooth. 



34. C. Davisii, Schw. & Ton-. Spikes 3-4, remote, oblong-cylindrical, 

 all on slender nearly exserted peduncles, nodding ; perigynia ovate-oblong, in- 

 flated, round-angled, emarginatc at the pointed apex, longer than the oblong 

 awned scale. — Mountains of Georgia, and northward — Culms 11° -2° high. 

 Leaves and sheaths more or less pubescent. S])ikes rather dense-flowered. 



35. C. miliacea, Muhl. Spikes 4, linear, all on exserted nodding peduncles, 

 the terminal one often wholly sterile ; perigynia yellowish, ovate, comprcssed- 

 3-anglcd, nerveless or nearly so, tapering into a spreading slightly emarginatc 

 point, as long as the oblong mucronate scale. — Mountains of Georgia, and 

 northward. — Culms weak, 1°-1^° high. Sheaths smooth. Lower perigynia 

 scattered. 



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

 ■*- Perigynia sin<dl (1" -3" long), slightly or not at all inflated, obtuse or short-beaked. 

 ** Fertile spikes sessile, ovoid or oblong, dense-fowered ; perigynia pubescait, short- 

 beaked or pointed. 



3G. C. flliformis, L. Sterile spikes 2 or more, slender, long-pcdunclcd ; 

 fertile spikes 1-3, distant, oblong; perigynia ovoid, ol)tuse, 3-angled, densely 

 pubescent, obscurely nerved, al)ruptly contracted into a short emarginatc point, 

 longer than the oblong mucronate brown scale. — Bogs and swam])s, South 

 Carolina, and norihward. — Culms 2° high, smooth. Leaves filiform, elongated. 

 Bracts leafy, many limes longer than the spikes. 



37. C. VCStita, Willd. Sterile spikes 1 -2, thick, short-pidiinclcd ; fertile 

 spikes 1-2, ajjproximate, ovoid or oblong ; perigynia ol)long-()vat(>, 3-anglcd, 

 densely iiubescent, strongly nerved, tapering into a distinct beak, with a white 

 membranaceous 2-cli ft orifice, longer than the oblong mucronate l>rt)wn scale. — 

 Sandy swamps in the upper ili.-iii<ls, and noiiliward — Culms rigid, acute- 



