OF ARTS AND SCIENCES. 139 



* Plants slender (except C. spargunioides) and the spikes more or less scattered 

 (except in C. muricata, var. conjixa). 



247. Carex tenella, Schkuhr, Riedgr. 23, f. 104. 

 O. disperma, Dewey, Sill. Journ. viii. 266. 



C. gracilis, Gray, Sill. Journ. 2d ser. iv. 19. 

 From New Jersey to California and northwestward into British 

 America. 



248. Carex rosea, Schkuhr, Riedgr. Nachtr. 15, f. 179. 

 Labrador, Storer, and the Northeastern States to Lake Winnipeg, 



Bourgeau. 



Var. RADIATA, Dewey, Sill. Journ. x. 276. 

 C. neglecta, Tuckerman, Enum. Meth. 19. 

 C. disperma, Kunze, Riedgr. Suppl. 131, t. 33. 

 (7 rosea ^ var. minor, Boott, 111. 81. 

 Throughout the States east of the Mississippi and those bordering 

 it on the west, north of North Carolina. More common than the 

 species, from which it differs chiefly in its slenderness and few-flowered 

 spikes. 



Var. RETROFLEXA, Torrey, Monogr. 389. 

 C. retroflexa, Muhl. ; Willd. Sp. PI. iv. 235. 

 G. bicostata, Olney, Exsicc. fasc. iv. no. 17. 

 Throughout the States east of the Mississippi, and Limestone Gap, 

 Indian Territory, Butler. Evidently more common southward. 



249. Carex vallicola, Dewey, Sill. Journ. 2d ser. xxxii. 40. 

 "Culm six to twelve inches high, very slender, slightly scabrous: 



leaves half a line broad, shorter than the stem : bracts roughly cuspi- 

 date from a broad hyaline-margined base, the lowest equalling or 

 exceeding its spike : head half an inch to an inch long, linear-oblong, 

 composed of four to seven narrowly oblong contiguous sessile spikes 

 which have a conspicuous column of staminate flowers at the apex : 

 scales chestnut-colored, membranaceous with very broad hj'aline 

 margins, clasping at the base, broadly ovate, acute or the scabrous 

 keel prolonged into a short mucro : perigynium pale brown, obovate, 

 abruptly attenuated to the base and to the obliquely cut entire beak, 

 convex on the outer side and concave on the inner, nerveless, sparsely 

 serrate above on the obtuse margins, about as long as and narrower 

 than the scale." — Southeastern Idaho, Hayden ; part of Bolander's 

 no. 4746, from near Mendocino City, California, is referred here by 

 Wm. Boott. I am not yet able to draw characteristic distinctions 

 between this species and C. muricata, var. gracilis. 



