CAREX. 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.) 



cf Spike erect, filiform ; 9 spikes 3 4, filiform, loose-flowered, flexuous, 

 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. Boon. (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. 

 12 18' high, erect, striate ; ITS. short, and shorter below; Ivs. and bracts ciliate. 

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



105. C. WASHINGTONIANA. Dew. 



<? Spike erect, with oblong and obtuse black glumes; 9 spikes 2 5, 

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

 distant, 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 distinctly triquetrous. Near summit of Mt. Washington, 

 N. H., Barratt. Is distinct from C. saxalilis, L., already described as found 

 on the White Mts. 



106. C. SULLIVANTII. 



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. 



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., 



4. Pistillate spikes scarcely sheathed. 



109. C. PALLESCENS. 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. UNDITLATA. 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 ; Its. pubescent. In the same situation as the preceding, 

 and scarcely to be distinguished from it. 



111. C. TORREYI. Tuckerman, 



<? Spike oblong, short pedunculate ; 9 spikes 2 3, short, oblong, subses- 



