592 CLX. CYPERACEJE. CAREX. 



the ovate-lanceolate, awned glume ; st. 12 24' high, nearly round below, with 

 flat, linear-lanceolate leaves and bracts. Glabrous and yellowish-green. Wet 

 places and marshes. Common. 



129. C. FILIFORMIS. Gooden. 



tf Spikes 2 3, with oblong glumes ; 9 spikes 2 3, ovate, oblong, short- 

 cylindric, close-flowered, remotish, erect; perig. ovate, villose, short-rostrate, 

 bifurcate, about equaling the ovate, acute glume ; st. 20 30' high, erect, slen- 

 der stiff 1 , with convolute leaves and bracts. Pale green. Marshes. Common. 



130. C. LACUSTRIS. Willd. 



c? Spikes 3 4, erect, sessile ; 9 spikes 2 3. erect, oblong, cylindric, 

 short-pedunculate; perig. ovate-oblong, tapering or lanceolate, bifurcate, gla- 

 brous, a little longer than the oblong, mucronate glume ; st. 2 3f high, sca- 

 brous above, erect and large, with long and large leaves and bracts. Light 

 green. Marshes. Common. 



131. C. RIPARIA. Gooden. 



& Spike 3 5, oblong, thick, erect, sessile ; 9 spikes 2 3, erect, oblong, 

 often long-cylindric ; perig. ovate-elliptic contracted into a short, bifurcate 

 beak, glabrous, about equaling or shorter man the ovate, mucronate, or oblong- 

 lanceolate glume ; st. 2 3f high, scabrous above, leafy below. Bright green. 



132. C. OLIGOSPERMA. Michx. (Oakesiana. Dew.) 



$ Spikes several, sometimes one, erect, slender, long-cylindric, with 

 an oblong obtusish glume ; 9 spikes 1 3, ovate, globular, sessile, distant ; 

 perig. few, ovate, inflated, acute, nerved, short-rostrate, entire at the orifice, 

 glabrous, a little longer than the ovate-lanceolate glume ; st. 1 2f high, sca- 

 brous above, leafy below; Ivs. involute and rush-like. Light |~een. About 

 the lakes of N. Eng. and N. Y. Abundant in the marshes of Midi. 

 133. C. VESICARIA. 



J* Spikes about 3, erect, oblong; 9 spikes 23, cylindric, erect, dense- 

 flowered, alternate, long-bracteate ; perig. ovate, oblong-conic, terete, inflated, 

 rostrate, nerved, diverging, glabrous, bicuspidate, nearly twice longer than the 

 oblong-lanceolate glume ; st. about 2f high, shorter than the leaves. Bright 

 green. Marshes. Not common. 



(3. utriculata. Dew. (C. utriculata. Boott.~) Perig. oblong-elliptic, nerved, 

 cylindric-rostrate, bicuspidate, more or less longer than the lanceolate, sca- 

 brous-awned glume. Marshes, with the other. 



134. C. AMPULLA CE A. Gooden. 



tf Spikes 2 4, oblong, cylindric, erect; 9 spikes 2 3, long-cylindric, 

 erect, close-flowered, short-pedunculate, sometimes tf above ; perig. subglobose, 

 inflated, diverging, nerved, glabrous, setaceous, rostrate, bifurcate, little longer 

 than the lanceolate glume ; st. 2 3f high, obtusely triquetrous, leafy. Light 

 green. Marshes. Common. 



135. C. MONlLE. Tuckerman. 



tf Spikes 2 4, long, slender, cylindric, with a long, lanceolate glume ; 9 

 spikes 2, long, cylindric, short-pedunculate, subloose-flowered, erect ; perig. 

 ovate, long-conic, subtriquetrous, inflated, rostrate, bicuspidate, more than 

 twice longer than the oblong-lanceolate glume ; st. 15 30' high, erect, with 

 long leaves and bracts. Bright green. Marshes. Not common. More loose- 

 flowered and fruit longer than that of C. msicaria. L. 



136. C. BULL ATA. Schk. 



tf Spikes 3, erect, slender, cylindric, with oblong-lanceolate glumes ; 9 

 spikes 2 3, rather long, cylindric, nearly erect ; perig. ovoid-globose, inflated, 

 glabrous, costate, with a long, scabrous beak, bifurcate, longer than the lance- 

 olate glume ; st. 20 30' high, rather slender, triquetrous, scabrous above, leafy 

 and shorter than the leaves. Glabrous, light green. In wet meadows. Com- 

 mon. 



137. C. TUCKERMANI. Dew 



tf Sp-ikes 2 3, cylindric, lower ones sessile and short, with an oblong, 

 acutish glume ; 9 spikes 2 3, oblong, cylindric, thick and large, pedunculate, 

 subloose-flowered ; perig. inflated, ovate, large, conic, costate, bifurcate, gla- 



