528 CYPERACEJE. (SEDGE FAMILY.) 



97. C. flexilis, Iludge. Sterile spike short and dub-sJiaped ; fertile spikes ob- 

 long, or sometimes with a few staminate flowers at the 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, Gray.) 

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



$ 9. Perigynia slightly inflated, obtusely 3-angled, nerved, smooth, tapering into a rath- 

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

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

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

 spike solitary, stalked (sessile in No. 101). FiAv.E. 



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



98. . laevigata, Smith. Fertile spikes 3, cylindrical, remote, on exserted 

 noddinp stalks ; perigynia ovoid, tapering into a 2-^left beak, rather longer than 

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

 Massachusetts (Tewksbury ? B. D. Greene). Introduced 1 ? (Eu.) 



99. C. flilva, Good. Fertile spikes 2-3, oblong or ovoid, erect, remote, the 

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

 scarcely pointed awnless scale; culm rough. (C. binervis, Dew., not of Smith.) 

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



# * Perigynia spreading or rejlexed, 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. Ilava, L. Fertile spikes 2-4, roundish-ovoid, compactly flowered, 

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

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

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

 pecially northward. Whole plant of a yellowish hue, 6' -15' high, with spikes 

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

 cies, have been referred by Prof. Dewey to C. lepidocarpa, 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. (Ederi, Ehrh. Sterile spike commonly sessile ; fertile 2-4, oblong* 

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

 flowered, sometimes staminate at the apex ; leaves and bracts 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. fy Tan. 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 are much smaller, and the beak of the latter is more abrupt, shorter, and 

 straight. (Eu.) \ 



10. Perigynia slightly inflated, obtusely 3-angled, nerved, rough or woolly, with 

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

 purple or brown. 



