528 CYPERACE^E. (SEDGE FAMILY.) 



97. C. flexilis, Rudge. Sterile spike short and club-shaped ; fertile spikes ob 

 long, Dr sometimes with a few staminute flowers at the base and becoming rlub- 

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

 slightly sheathing ; pcrigynia 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. Pcrigynia slightly inflated, obtusely 3-angled, nerved, smooth, tapering into a rath- 

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

 beaming tawny or yeUoiv at maturity (or in No. 98 more or less spotted with 

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

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



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



98. C. lae Vigata, Smith. Fertile spikes 3, cylindrical, remote, on exserted 

 nodding stalks; pcrigynia ovoid, tapering into a 2-cleft beak, rather longer than 

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

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



99. . fTfllva, Good. Fertile spikes 2 -3, oblong or oi-oid, erect, remote, the 

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



i scarce/ u pointed awnless scale; culm rough. (C. binervis, Dem:, not of Smith.) 

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

 * # Pcrigynia spreading or rrflexed, 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. flava, L. Fertile spikes 2-4, roundish-ovoid, compactly flowered, 

 the upper approximated, the lowest remote on a short exserted staik ; bractt 

 Sfireadingor reftexed ; 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 Kunzc.) (Eu.) 



101. C. GEIdcri, 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 bmcts rigidly met; peii- 

 yynfa ovoid, with a short and rather abrupt minutely notrin-d btak, spreading horizon- 

 tally at maturity. (C. viridula, Michx., not of Schn\ <j- 7 on: C. irrcgularis, 

 S<:hn:) Wet rocks, especially on limestone, New England to 111., Lake Su- 

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

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

 straight. (Eu.) 



f 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. 



