22 CTPERACE^E. (SEDGE FAMILY.) 



lines. ( X undulita, Kunze.) Meadows, Now England to Penn. and north- 

 ward. riant 8' - 18' high, with slightly pubescent culm and leaves. (Eu.) 



66. C. COIlOidca, Schk. Staminate sjrike on a long stalk ; fertile 2-3, 

 oblong, closely flcwcred, the lower distant; perigynia oblong-conical, with impressed 

 nerves, slightly oblique at the summit, rather longer (or sometimes shorter) than 

 the sharply pointed or awned scale ; bracts not exceeding the culm. (C..tetanica, 

 Schw. &r Torr., not of Schk.) Moist meadows ; rather common. 



67. C. grisea, Wahl. Fertile spikes 3-5, oblong, loosely flowered, remote, 

 and the lowest distant ; perigynia ovoid-oblong, rather longer than the ovate awned 

 scale. (C. laxiflora, Schk., not of Lam.) Var. MtixiCA has longer cylindrical 

 spikes, short-awned scales, and the leaves and bracts pale green and glaucous. 

 (C. laxiflora? var. mutica, Torr. fr Gr. C. flaccosperma, Dew.) Moist woods 

 and meadows; common, especially southward. The variety, with spikes I'-l^' 

 long, occurs in New Jersey (Knieskern) and in the South. 



# * # Uppermost spike more or less pistillate at the apex (rarely all staminate) ; 

 pistillate spikes 3-5, oblong or cylindrical, loosely flowered, distant, on exserted 

 filiform and mostly drooping stalks : bracts equalling or often exceeding the 

 culm : perigynia oblong, with a short and abrupt notched point (obsolete in 

 No. 70), green and membranaceous at maturity : pistillate scales tawny or 

 white. GRACf LLIMJE. 



*- fertile spikes nodding or pendulous. 



68. C. Davisii, Schw. & Torr. Fertile spikes oblong-cylindriqal, rather 

 thick ; perigynia somewhat contracted at each end, scarcely longer than the conspic- 

 uously awned scale. (C. aristata, Dew., not of R. Br. C. Torreyana, Dtw.) 

 Wet meadows, Massachusetts to Wisconsin, and southward. Larger than the 

 next (l-2 high), and with stouter and longer spikes. 



69. C. fortlldsa, Dew. Fertile spikes oblong, short, all commonly with 2- 

 3 barren flowers or empty scales at the base ; perigynia somewhat contracted at 

 each end, nearly twice as long as the pointed or cuspidate scale. Wet meadows ; 

 Massachusetts to W. New York. 



70. C. gracilltma, Schw. Fertile spikes linear, slender ; perigynia obtuse 

 and slightly oblique at the orifice, longer than the oblong awned scale. (C. digita- 

 lis, Schw. fr Torr., not of Willd.) Wet meadows, New England to Kentucky, 

 Wisconsin, and northward. When this species occurs with the uppermost 

 Bpike altogether staminate, it resembles C. arctata; but is readily distinguished 

 by the obtuse, beakless, and sessile perigynium. 



H- + Fertile spikes nearly erect, all but the lowest short-peduncled or nearly sessile. 



71. C. aestivalis, M. A. Curtis. Spikes slender, loosely flowered; peri- 

 gynia acutish at both ends, twice the length of the ovate obtuse or mucronate scale; 

 achenium somewhat stipitate ; sheaths of the lower leaves pubescent : otherwise 

 nearly as the last, but a smaller plant (l-l high). Saddle Mountain, W. 

 Massachusetts (Dewey), Pokono Mountain, Perm. (Darlington fr Townsend), and 

 along the Alleghanies to Virginia and southward. 



t 3. Perigynia without a beak, hairy (in No. 73 becoming smooth at maturity), 

 slightly inflated, bluntly 3-anglcd, obtuse, conspicuously nerved, with a minuta 



