OP ARTS AND SCIENCES. 81 



Var. HYPERBOREA, Boott, 111. 167. 



C. Bigelovii, Torr. ; Schwein. An. Tab. 



C Washingtoniana, Dewey, Sill. Journ. x. 272. 



C. saxatilis, Dewey, Wood's Bot. ed. i. 581. 



C. saxatilis, var. Bigelovii, Torr. Monogr. 397. 



C. hyperborea, Drej. Revis. Crit. Car. 41. ^ 



C. rigida, var. Bigelovii, Tuckerman, Enum. Meth. 19. 



C. limula, Fries, Summa, 229. 



a dnhitata, Dewey, Wood's Bot. 1861, 755. 

 White Mountains to Greenland ; Mountains of Colorado and N. 

 California to Alaska. 



Var. ALPiNA, Boott, 111. 167. 



C. rigida, Gooden. Linn. Trans, ii. 193, t. 22. 



C. saxatilis of Scand. authors, not Linn. 

 Westward with the last. 



Var. BRACTEOSA. 



Culm slender, a foot or more high, rough, erect, bearing a long and 

 leafy auricled bract about equalled by the flat pale leaves : pistillate 

 spikes two or three, small and globular, black or nearly so, sessile, the 

 one or two upper ones adjoining the small staminate spike (which is 

 a half-inch or less long), the lowest one sometimes remote and borne 

 in the axil of the long bract : perigyniura much as in var. alpina, but 

 smaller. — Ebbett's Pass, California, alt, 8,000 feet. Brewer 2015. 



64. Carex decidua, Boott, Linn. Trans, xx. 119. 



C. Andersoni, Boott, Hook. Fl. Antarct. ii. 364. 

 See Bot. Gaz. x. 204 (plate). — Differs from C. indgaris as 

 follows : spikes heavier : scales and perigynia deciduous : perigynium 

 conspicuously stipitate and strongly nerved. — California, Thurber, 

 according to Boott ; Oregon, Herb. Founded upon specimens from 

 Terra del Fuego and the Falkland Islands. 



65. Carex nudata, W. Boott, Bot. Calif, ii. 241. 

 Distinguished from C. vulgaris by its fibrillose sheaths and decidu- 

 ous perigynium, and from both that species and C. decidua by its long 

 and thin finely punctate, lightly nerved perigynium, which is empty 

 in the upper half. Not well defined. The perigynia are often straw- 

 colored and somewhat inflated. The fibrillose sheaths are conspic- 

 uous, a character which is supposed never to occur in C. vulgaris. 

 Northern Lower California, Orcutt, to Trask Eiver, Oregon, Hen- 

 derson. I 



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