284 University of California Publications in Botany [VOL. 9 



Zone. Canadian, rarely coming down along streams into the 

 Transition. 



Specimens examined. Butterfly Valley, Plumas County, 3,800 feet, 

 (Transition?), Hall 9274; Gold Lake, Sierra County, 6,400 feet, Hall 

 and Babcock 4503 ; Hunter Creek, "Washoe County, Nevada, 6,000 feet, 

 Kennedy 1898; ridge below Lake Lucile, Tahoe, Dudley, June 26, 

 1900; Gilmore Lake, Tahoe, 8,300 feet, Abrams 4855; at water's edge, 

 Lower Angora Lake, Tahoe, Miss Lathrop, July 21, 1909 ; same 

 locality, 7,700 feet, Smiley 31 ; Castle Peak, by a small lake, 8,300 feet, 

 Smiley 474; Carson Spur, Amador County, Hansen 794; Mt. Tallac, 

 Dudley, June 9, 1893; Shuteye Pass, Sierra National Forest, 7,000 

 feet, Abrams 4940; above Donner Lake toward Donner Pass, Heller 

 7046; Mono Pass, Bolander; head of Tuolumne River, 9,000 feet, 

 Brewer 1763 ; trail from Snow Creek to Lake Tenaya, Yosemite, by a 

 small lake, 8,500 feet, Smiley 676; meadows near Black Mountain, 

 Fresno County, 9,500 feet, Hall and Chandler 597 ; Nellie Lake, Fresno 

 County, 8,700 feet, Smiley 599; South Lake, Bishop Creek, Inyo 

 County, 10,000 feet, A. Davidson 2650; Southern Sierras, Brewer 

 2831; Mineral King, Tulare County, Coville and Funston 1556; 

 Hockett's meadows, Tulare County, Culbertson (B4426); Needles 

 Ridge, Lloyd Mountain, Tulare County, 8,000 feet, Dudley 856 ; Alta 

 Peak trail, Tulare County, Dudley 1253. 



This is the most characteristic shrub growing about lake borders 

 in the Canadian zone and frequently the smaller lakes will be found 

 nearly surrounded by a growth of Ledum. 



4. PLEURICOSPORA 



1. Pleuricospora fimbriolata Gray, Proc. Am. Acad., vol. 7, p. 369. 

 1868. 



Type locality. ' ' In or near the Mariposa Sequoia gigant&a Grove, ' ' 

 California. 



Range. California to Washington. 



Zone. Transition and Canadian. 



Specimens examined.^ Plumas County, Mrs. Austin in 1877 ; Big 

 Trees, Mariposa County, Bolander 4997; near Tar Gap, Tulare 

 County, 2,770 m., in an Alies magnifica forest, Hall, 5587. 



