OF ARTS AND SCIENCES. 101 



Variable in size. Transition to the Gracillimae. — New England 

 to North Carolina and the Indian Territory, Butler. South America. 



118. Carex tkiceps, Michx. Fl. Bor.-Am. ii. 170. 

 a hirsuta, Willd. Sp. PI. iv. 252. 



G. viridula, Schwein. & Torr. Monogr. 320. 



C. hirsuta, var. pedunculata, Schwein. & Torr. Monogr. 323. 



G. complanata, Torr. «fe Hook. Monogr. 408. 



C. Smithii, Porter ; Olney, Exsicc. fasc. i. no. 28. 



G. BolUana, Boeckeler, Flora, 1878, 40. 

 Very variable. — New England to Florida and to Michigan (rare) , 

 and southwestward to Louisiana, Hale^ Indian Territory, Butler, and 

 Texas, Wright^ Hall, Reverchon. 



119. Carex androgyna. 



G. olivacea, Liebmann, Mex. Ilalv. 79, not Boott. 

 " Culm one and a half to two and a half feet high, slender and 

 flexuose, triquetrous, glabrous : radical leaves and the lower cauline 

 one shorter than the culm, narrowly linear, long-acuminate, carinate, 

 rough on margin and keel : head of spikes an inch or more long : 

 spikes three to five, appressed, cylindrical, terminal nine to ten lines 

 long, androgynous with the base staminate, the lateral occasionally 

 sessile and androgynous or the lower more remote and short-pe- 

 duncled, pistillate, some of the upper ones sometimes staminate at 

 base : bracts leafy, carinate, shorter than the culm, the margins and 

 keel scabrous : staminate scales oblong, obtuse, three-nerved on the 

 back, margins scarious ; pistillate scales shorter than the perigynium, 

 ovate-lanceolate, acuminate, carinate, concave, three-nerved on the 

 back, the mid-nerve olive-colored and rough above, margins hyaline : 

 perigynium stipitate, somewhat compressed, elliptical-triquetrous, 

 glabrous, olive-colored, lateral nerves plane and the dorsal convex, 

 beak emarginate : achenium broadly elliptic, sides plane, very slightly 

 punctulate, a third shorter than the perigynium." — Peak of Orizaba, 

 South Mexico, at 10,000 feet, Sept. 1, Liebmann. 



120. Carex anisostachys, Liebmann, 1. c. 78. 



Culm six inches high, slender, triquetrous, rough on the angles : 

 leaves usually shorter than the culm (equalling the culm in small 

 specimens), narrowly linear, long-acuminate, carinate, the keel and 

 margins ciliate, sheaths compressed, cinnamon-color: spikes three to 

 four, sessile, appressed, cylindrical, terminal eight lines long, andro- 

 gynous with the base staminate, the others five lines long, alternate 

 and approximate or the lowest rather remote : bracts leafy-setaceous, 



