528 CTPERACEiE. (sedge FAMILY.) 



97. C. flexnis, Radge. Sterile spike short and cliib-slmped ; fertile spikes ob- 

 long, or sometimes with a few staminate flowers at tlie base and becoming club- 

 shaped ; the upper bracts short and scale-like, the lower bristle-shaped, very 

 slightly sheathing; perigynia ovoid, obscurely nerved, tapering into a beak 

 about the length of the ovate hairy-fringed scale ; leaves pale green and glaucous, 

 and with the bracts fringed with delicate hairs. (C. blepharophora, Grai/.) — 

 Moist, shady places, W. New York, Lake Superior, and northward. 



§ 9. Perigijnia slightly inflated, olituselg 3-angled, nerved, smooth, tapering into a rath- 

 er rough beak, with two distinct membranaceous teeth (obscure in No. 101 ), 

 becoming tawny or ydlmo at maturity (or in No. 98 more or less spotted with 

 purple) : aehenium obovate-triquetrous, contracted at the base : staminate 

 spike solitary, stalked (sessile in No. 101). — FlAv^. 



^ Perigynia erect : bracts with long sheaths, not exceeding the culm. 



98. C. ISGVig^itta, Smith. Fertile spikes 3, cylindrical, remote, on exserted' 

 nodding stalks; perigynia ovoid, tapering into a 2-cIeft beak, rather longer than 

 the light-brown pointed and awned scale; culm smooth. (C. Greeniana, Dew.) — 

 Massachusetts (Tewksbury? B. D. Greene). Introduced? (Eu.) 



99. C fulva, Good. Fertile spikes 2-3, oihng or ovoid, erect, remote, the 

 lowest on an exserted stalk ; perigynia ovoid, not much exceeding the dark-brown 

 scarcely pointed amnless scale; culm rough. (C. binervis, Dew., not, oi Smith.) — 

 Pond at Towksbury, Massachusetts, B. D. Greene, (Eu.) 



# * Perigynia spreading or reflexed, longer than the scale : bracts with short sheaths, 

 much exceeding the smooth culm. (Staminate spike often pistillate at the apex 

 or towards the centre; fertile spikes erect.) 



100. C. flRVa, L. Fertile spikes 2-4, roundish-ovoid, compactly flowered, 

 the upper approximated, the lowest remote on a short exserted stalk ; bracla 

 spreading or reflexed; perigynia tapering from an ovoid contracted base into a nar- 

 row curaed beak, widely spreading or reflexed at maturity. — Wet meadows, es- 

 pecially northward. — Whole plant of a yellowish hue, 6' - 1 5' high, with spikes 

 J'-f in length. (Specimens, appearing to be merely small forms of this spe- 

 cies, have been referred by Prof Dewey to C. lopidocarpa, Tausch; but they by 

 no means accord, nor does his character, either with the description, or with au- 

 thentic specimens of Kunze.) (Eu.) 



101. C. <£dcri, Ehrh. Sterile spike commonly sessile; fertile 2 -i, oblong- 

 ovoid, closely aggregated, or the lowest rather remote, on very short stalks, densely 

 flowered, sometimes staminate at the apex; leaves and brads rigidly erect; peri- 

 gynia ovoid, with a short and rather abrupt minutely notched beak, spreading horizon- 

 tally at maturity. (C. viridula, Michx., not of Schw. Sf Torr. C. irregularis, 

 Schw.) — Wet rocks, especially on limestone. New England to Ohio, Lake Su- 

 perior, and northward. — Resembles the last; but the fertile spikes and perigy- 

 nia arc much smaller, and the beak of the latter is more abrupt, shorter, and 

 straight. (Ku.) 



5 10. Perigynia slightly inflated, obtusely 3-anglod, nerved, j'ough or woolly, with 

 an abrupt straight beak : bracts leaf-like, with short slieaths : scales dark- 

 purple or brown. 



