UAREX. CLX. CYPERACE^E. 589 



hyaline glume; st. 4 10' high, erect, with subradical and bristle-form leaves. 

 Pale green, common. Abundant along the banks of the Genesee. 



102. C. DEBILIS. Michx. (C. flexuosa. Schk.) 



J* Spike erect, filiform ; 9 spikes 3 4, filiform, loose-flowered, fiexuous, 

 nodding, remotish, 1 2' long ; perig. oblong-lanceolate, subtriquetrous, alter- 

 nate, rostrate, bifid, glabrous, nerved, nearly twice longer than the ovate-lanceo- 

 late glume; st. 1 2f high, triquetrous and scabrous above, leafy towards the 

 base. Bright green. Moist woods and meadows, common. 



103. C. ARCTATA. Boott. (C. sylvatica. Dew.) 



9 Spikes 3 4, long and slender, loose-flowered, nodding and remote ; 

 perig. ovate, triquetrous, lanceolate or long-rostrate, subventricose, bifid, gla- 

 brous, little surpassing the ovate, membranaceous, mucronate glume ; st. 10 

 20' high, scabrous above and leafy below. Pale green. In the same situations 

 as the preceding, common. 



104. C. FLEXILIS. Rudge. (C. castanea. Wahl. C. blephoriphora. Gray.) 

 9 Spikes 2 4, ovate-oblong, cylindric, nodding; perig. ovate, subconic, 



rostrate, bidentate, scarcely shorter than the ovate, obtusish, oblong glume ; st. 

 1*218' high, erect, striate ; Irs. short, and shorter below; Ivs. and bracts ciliate. 

 Bright green. Oneida Co., N. Y., Gray. 



105. C. WASHINGTONIANA. Dew. 



tf Sp-lke erect, with oblong and obtuse black glumes ; Q spikes 2 5, 

 oblong, cylindric, subremote, erect, loose-flowered, black or dark brown, sub- 

 di.stant, upper sessile ; perig. oval, acutish at both ends, glabrous, short-rostrate, 

 entire at the orifice, about equaling the ovate-oblong, subacute, blackish glume 

 with a white edge; st. a foot or more high, triquetrous, subscabrous above. 

 Light green. Seed distim-Uy triquetrous. Near summit of Mt. Washington, 

 N. H., Barratt. Is dis:.ujct from C. saxatilis, L., already described as found 

 on the White Mts. 



106. C. SUI,MVANT:I. 



9 Spikes 3, oblong, erect, cylindric, rather loose-flowered, bracteate, and 

 the lowest long-pedunculate and sparsely flowered below; perig. ovate, acute 

 and .subrostrate, subtriquetrous and 2-toothed, equaling the ovate-oblong and 

 mucronate glume; plant light green. Ohio. v 



107. C. KNIEISKERNII. Dew. 



9 Spikes 3, long-cylindric, rather distant, sublax-flowered, with recurved 

 peduncles; perig. ovate, oblong, subtriquetrous, terete-conic, rostrate, short-2- 

 toothed, a little longer than the ovate and oblong glume, which is obtusish and 

 short-mucronate. 



108. C. WOODII. Dew. 



9 Spikes 1 3, ovate-oblong, loose-flowered, erect, lower long-peduncu- 

 late, recurved ; perig. obovate, obtuse, subtriquetrous, closed at the orifice, 

 tapering below, twice longer than the ovate and acutish glume; Ivs. narrow 

 and linear, and with the stem closely and slightly pubescent. Jefferson Co., 

 N. Y. 



4. Pistillate spikes scarcely sheathed. 



109. C. PALI.ESCENS. L. 



9 Spikes 2 3, oblong, short, cylindric, distant, nodding towards maturity; 

 perig. oval, obtuse, round, about equal to, or a little shorter than, the ovate 

 glume; st. 6 16' high, hardly erect; bracts sometimes transversely rugose. 

 Plant often subpubescent, and of a light green. In dry meadows. Common. 



110. C. UNDULATA. KunZC. 



9 Spikes 2, erect, ovate-oblong; perig. oblong, round, triquetrous, obtuse, 

 striate, very short-beaked, bidentate, longer than the oblong, cuspidate, mucro- 

 nate glume; st. 12 18' high, erect, triquetrous, scabrous; lower bract trans- 

 versely waved-plicate ; Ivs. pubescent. In the same situation as the preceding, 

 and scarcely to be distinguished from it. 



111. C. TORREYI. Tuckerman. 



J* Spike oblong, short pedunculate ; 9 spikes 2 -3, short, oblong, subses- 



