110 PROCEEDINGS OF THE AMERICAN ACADEMY 



triangular, turgid, sides all alike and plane, slightly many-nerved 

 and punctate, short-beaked, the beak hirtellate with a slightly emar- 

 ginate orifice : achenium obovate, equalling the perigynium, densely 

 punctulate, the angles pronainent. — Valley of Mexico, no. 513, 

 Schaffner." 



145. Carex granularis, Muhl. ; Willd. Sp. PI. iv. 279. 

 C. chlalaros, Steud. Cyper. Plant. 231. 



C. Haleana, Olney, Exsicc. fasc. iii. no. 14. 

 In grassy places throughout the States east of the Mississippi; 

 Saskatchewan, Boui-geau, Macoim. 



146. Carex microdonta, Torrey & Hooker, Monogr. 423. 

 C. alveata, Boott, Journ. Bost. Nat. Hist. Soc. v. 7. 



C. Bcemenana, Scheele, Linnsea, xxii. 346. 

 a Wrightii, Dewey, Bot. Mex. Bound. 232. 

 Distinguished from C. Crawei by its greater height and looser 

 habit, its sheathing leaves, more numerous staminate spikes, more 

 slender pistillate spikes which are more or less long-peduncled, and 

 a stronger nerved perigynium. Culm usually a foot or eighteen inches 

 high, rather slender. Leaves often involute when dry. The pistil- 

 late spikes are often staminate at the top, and to this form I have no 

 hesitation in referring Scheele's G. Rcemeriana. Transition to the 

 AnomaliB. —Texa,s, Bnimmond, Wright, Hall Q' wet prairies, Hous- 

 ton"), Lindheimer ("in patches on low ground"); Louisiana and 

 Arkansas according to Boott. 



Var. LATIFOLIA. 



Leaves short (three to four inches long) and broad and flat (three 

 lines broad), many nerved, long-acuminate, the sheaths loose and 

 'conspicuous. — Texas, Buckley, " wet prairies at Dallas," Reverchon. 



Var. CONTROVERSA. 



O. extensa, Boott, 111. 207, as to Gregg's specimens. 

 Culm two to four inches high, exceeded by the narrow leaves: 

 perigynium broader and shorter beaked than in the species. — Marshy 

 ground near San Pablo, Mexico, Gregg. 



147. Carex Crawei, Dewey, Sill. Journ. 2d ser. ii. 246. 

 a heterostachya, Torr. Sill. Journ. 2d ser. ii. 248. 



C. Crawei, var. heterostachya, Dewey, Sill. Journ. 2d ser. xlii. 4 

 (Index Car.). 

 Perhaps too near the last. — From Montreal, Macrae, to New 

 York and Michigan, and thence northwestward to Winnipeg Valley, 

 Bourgeau. 



