522 CYPERACE^. (sedge family.) 



lines. (C. undalata, Kimze.) — Meadows, Now England to Penn. and north- 

 ward. — Plant 8'-18' high, with sliglitly pubescent culm and leaves. (En.) 



66. C. conoidea. Schk. Siammate spike on a lory stalk ; fertile 2-3, 

 oblong, closely flowered, the lower distant ; penigynia 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. Sf Ton., not of Schk.) — Moist meadows ; rather common. 



67. C. g^rlsea, 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. MtjTiCA has longer cylindrical 

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

 (C. laxiflora? var. mutica, Torr. Sr Or. C. flaccospferma, Dew.) — Moist woods 

 and meadows ; common, especially southward. The variety, with spikes 1'- 1^' 

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



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

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

 Aliform 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. — GitAcf LLiMiE. 



-I- Fertile spikes nodding or pendulous. 



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

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

 uously aioned scale. (C. aristata. Dew., not of R. Br. C. Torreyana, Dew.) — 

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

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



69. C. formosa, 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. gracillima, Schw. Fertile spikes linear, slender ; perigynia obtuse 

 and sligkly oblique at the oriflce, longer than the oblong awned scale. ( C. digita- 

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

 Wisconsin, and northward. — When this species occurs mth the uppermost 

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

 by the obtuse, beakless, and sessile perigynium. 



^- -1- Fertile spikes nearly erect, all but the lowest short-petioled 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°-lj° high). — Saddle Mountain, W. 

 Massachusetts {Dewey), Pokono Mountain, Penn. {Darlington Sf Townsend), and 

 along the AUeghanies to Virginia and southward. 



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

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



