1921] Smiley: Flora of the Sierra Nevada of California 397 



feet, Hall and Chandler 4751; north side of Wood's Peak, 9,000 

 feet, Brewer 2129 ; above head of Indian Caiion, Yosemite, Congdon, 

 August 27, 1899; mountains near Little Kern River, 10-11,000 feet, 

 Purpus 5205 ; Mineral King, Tulare County, T. S. Brandegee, July 

 28, 1892; Farewell Gap, Tulare County, 10,400 feet. Hall and Bab- 

 cock 5659. 



According to Dr. Rydberg, the plants here referred to A. norvegica 

 Fries, as well as similar plants from the Rocky Mountains from 

 Alberta to Colorado, should be assigned to A. saxicola Rydb. (Bull. 

 Torr. Bot. Club, vol. 32, p. 128. 1905), which differs from the Euro- 

 pean plant described by Fries in having more numerous and smaller 

 heads borne on shorter peduncles and in the greater development of 

 the hairy pubescence. Examination of such European material as 

 has been available for study seems to bear out Dr. Rydberg 's state- 

 ment as to the comparative size of the heads, though the degree of 

 difference is in any case slight, but not as to the length of peduncles, 

 while the differences in amount of pubescence appear to be determined 

 by the date of collection, the older leaves being nearly or quite glabrate. 

 For the reason that my opportunity to make adequate comparison of 

 the Old and New World material was limited to a few sheets of the 

 former, I am not now prepared to form an opinion as to the sum total 

 of the slight differences, which Dr. Rydberg considers sufficient war- 

 rant for excluding A. norvegica Fries from North America. In any 

 case, the plants here considered constitute a species common to both 

 the Rocky Mountains and to the Sierra Nevada, but apparently absent 

 from the northern Cascades. 



6. Artemisia Tilesii var. unalaschensis Besser, Linnaea, vol. 15, 

 p. 106. 1841. 



Type locality. — "Ex insula Unalaschka. " 



Range. — Aleutian Islands to California. 



Zone. — Canadian and Hudsonian. 



Specimens eoM/niined. — Meadows at soda springs near Mono Pass, 

 Bolander 6153 ; stony places near Little Kern River, 9-10,000 feet, 

 Purpus 5168; dry mountain slopes above Hockett's meadows, Tulare 

 County, 9,400 feet, Purpus 2095. 



In the California material at least, this variety connects by a prac- 

 tically complete series of intermediates with A. heterophylla Nutt. 



