120 University of California Publications in Botany [Vol. 9 



23. Carex Liddonii Boott, in Hook., Fl. Bor. Am., vol. 2, p. 214, 



t. 215. 1839. 



C. adusta var. congesta W. Boott in Wats., Bot. Calif., vol. 2, p. 238. 1880. 

 C. Liddoni Boott var. incerta Bailey, Bot. Gaz., vol. 13, p. 89. 1888. 



Type locality. — ' ' Columbia River. ' ' 



Range. — Pacific Coast east to the Rocky Mountains. 



Zone. — Transition and Canadian. 



Specimens examined. — Dry soil in caiion above Slippery Ford, 

 Eldorado County, 6,500 feet, Brainerd 191^/2 ; Truckee River Basin, 

 Placer County, Davy 3266 ; Soda Springs, Nevada County, 7,000 feet, 

 Jones 2515; Angora Lake, Tahoe, 7,600 feet. Smiley 32. 



24. Carex aurea Nutt., Gen., vol. 2, p. 205. 1818. 



Type locality. — "On the shores of Lake Michigan." 



Range. — Newfoundland to British Columbia and south to Califor- 

 nia, Colorado, Middle States, and southern New England. 



Zone. — Transition and Canadian. 



Specimens examined. — Glen Alpine, Tahoe, McGregor 21 ; Suzy 

 Lake, Tahoe, above Glen Alpine, 7,100 feet. Smiley 197 ; soda springs. 

 Upper Tuolumne River, Bolander 6220 ; open ground near soda 

 springs, Tuolumne meadows, 8,600 feet, R. A. Ware, 2705c. 



25. Carex nebraskensis var. praevia Bailey, Mem. Torr. Bot. Club, 



vol. 1, p. 49. 1889. 



Type locality. — Not given. 



Range. — Sierra Nevada; east to Colorado and northward through 

 Oregon to Washington. 



Zone. — Transition, rising into the Canadian. 



Specimens examiined. — Lower end Donner Lake, Heller 6913 ; Sil- 

 ver Valley, rather dry places. Brewer 1970 ; Bonita meadow, Tulare 

 County, Hall and Babcock 5182 ; Kern River, 9800 feet, Rothrock 371. 



26. Carex rigida Gooden., Linn. Trans., vol. 2, p. 193. 1704. 



Type locality. — Not ascertained. 



Range. — In America south to the mountains of Quebec, Rocky 

 Mountains, and Sierra Nevada. 



Zone. — Arctic-alpine, rarely in Hudsonian. 



Specimens examined. — Mt. Dana, Bolander 5077 ; Snow Flat, 

 Yosemite, 8,700 feet. Hall and Babcock 3493 ; Mt. Dana, wet meadow 

 on the north side, 11,800 feet. Smiley 726. 



