394 University of California Publications in Botany [VOL. 9 



Specimens examined,. Lake Tahoe, G. B. Grant, July 20, 1906; 

 Glen Alpine, Tahoe, Dudley, June 28, 1900 ; Half-Moon Lake, Tahoe, 

 7,760 feet, McGregor 69. 



2. Achillea borealis Bong., Mem. Acad. St. Petersb. VI, vol. 2, p. 

 149. 1832. 



Type locality. Sitka. 



Range. Subarctic America from Alaska to Labrador, south to 

 eastern Quebec, in the Rocky Mountains of New Mexico, and on the 

 Pacific Coast to California. 



Zone. Canadian to above timber line. 



Specimens examined. Silver Mountain, Alpine County, 10-11,000 

 feet, Brewer 2587; Cloud's Rest, Yosemite, Chesnut and Drew, July 

 12, 1889; Tuolumne meadows, Yosemite, dry gravelly pine forest, 

 8,650 feet, R. A. Ware 2700c. 



According to Pollard 125 this species ranges along the mountain 

 axis of Mexico to Central America. 



23. TANACETUM 



1. Tanacetum canum D. C. Eaton, in "Wats., Bot. King's Exped., 



p. 179. 1871. 

 Sphaeromeria cana Heller, Muhl., vol. 1, p. 7. 1900. 



Type locality. "Limestone rocks at the mouth of a canon in the 

 East Humboldt Mountains, Nevada; 6,500 feet elevation." 



Range. Mountains of Nevada, west to the east slope of the Sierra 

 Nevada and north to Stein 's Mountains of Oregon. 



Zone. Arid Transition to Canadian ; perhaps above. 



Specimens examined. Vicinity of Lundy, Mono County, 8-9,000 

 feet, Miss M. Minthorn ; Mt. Dana, Congdon, August 11, 1898 ; Bloody 

 Canon, Mono County, Congdon, no. C 167 ; rocky slopes near Farewell 

 Gap, Tulare County, 10,700 feet, Purpus 5203; Olancha Mountain, 

 Tulare County, 10,000 feet, Rothrock. 



