1921 ] Smiley: Flora of the Sierra Nevada of California 229 



Zone. Arid Transition, mainly near the upper limit of that zone, 

 and extending into the lower Canadian on rocky outcrops. 



Specimens examined. Growing on a rocky point above Grass Lake, 

 Tahoe, Miss Lathrop, July 19, 1909 ; Silver Mountain, Alpine County, 

 Brewer 2039; mountain near Sonora Pass, 8-9,000 feet, trees 6-10 

 inches diameter, 15-20 feet high, Brewer 1876; Olancha Mountain, 

 Tulare County, 9,400 feet, Rothrock 330. 



2a. Cercocarpus ledifolius var. intricatus (Wats.) Jones, Bot. 



Gaz., vol. 5, p. 154, 1880. 



C. intricatus Wats., Proc. Am. Acad., vol. 10, p. 346. 1875. 

 No specimen of this high mountain form has been seen from the 

 Sierra ; it is here included because not unlikely growing on the higher 

 peaks of the Carson Range, east of Lake Tahoe. 



3. PRUNUS 



1. Primus emarginata (Dougl.), Walp., Repert. Bot., vol. 2, p. 9. 



1843. 

 Cerasus emarginata Dougl., in Hook., Fl. Bor. Am., vol. 1, p. 169. 1830.* 



Type locality. "On the upper part of the Columbia River, 

 especialy about the Kettle Falls." 



Range. British Columbia to northwest Montana and south on the 

 Pacific Coast to the mountains of southern California. 



Zone. Arid Transition and locally rising into the Canadian. 



Specimens examined. Spanish Peak, Plumas County, 3-6 feet 

 high, among summit rocks, 7,000 feet, Hall 9291 ; same locality, 5-6,000 

 feet, Mrs. Austin in 1877; above Donner Lake toward Donner Pass, 

 Heller 7164 ; Donner Lake, Dudley, June, 1900 ; between Fallen Leaf 

 Lake and Glen Alpine, Tahoe, dry hillside, 7,200 feet, Smiley 220; 

 Grass Lake, 7,200 feet, McGregor 94; north slope of moraine, south 

 of Fallen Leaf Lake, 6,900 feet, Smiley 14 ; Little Shuteye Pass, Sierra 

 National Forest, 7,000 feet, Abrams 4930; Glacier Point, Yosemite, 

 Congdon, May (without year) ; Mt. Raymond slope at 6,500-7,000 feet, 

 Dudley, July 13, 1901; Grant Park, Tulare County, "the common 

 prune of 7-9,000 ft." Dudley 1233; Big Arroyo, Tulare County, Cul- 

 bertson (B4539). 



This cherry occurs abundantly in the upper part of the Transition 

 zone and in the lower Canadian, where it forms a considerable part of 

 the chaparral of this altitude. 



a detailed synonymy see Wight, W. P., Native American Species of 

 Prunus. Bull. U. S. Dept. Agr. 179, pp. 1-75. 1915. 



