368 University of California Publications in Botany [VOL. 9 



Leaves mainly or entirely radical. 



Leaves lobed or trifid 9. E. compositus 



Leaves entire. 



Plant silvery-whitish 10. E. tener 



Plants green. 



Leaves cinerous; rays fewer (20-40); greenish involueral bracts hirsute 



or hispid with straight hairs 11. E. nevadensis 



Leaves nearly glabrate, ciliate; rays numerous (35-50); purplish invo- 

 lueral bracts with long erinite hairs 12. E. ursinus 



1. Erigeron salsuginosus Gray, Proc. Am. Acad., vol. 16, p. 93. 



1880. 

 Aster salsuginosus Richards., Bot. App. Frankl. Jour., vol. 2, p. 748. 1823. 



Type locality. "On the salt plains in the Athabasca." 



Range. Subarctic America west of Hudson's Bay, south to New 

 Mexico and California. 



Zone. Canadian mainly, rising into the Hudsonian. 



Specimens examined. About Summit Station, Heller 6974; Cisco, 

 Placer County, 6,100 feet, Hall 8754; moist hillside near Summit, 

 7,000 feet, Smiley 437 ; Half-Moon Lake, Tahoe, 7,760 feet, McGregor 

 78; Grass Lake trail, Tahoe, Miss Lathrop, July 19, 1909; Peregoy's 

 meadows, above Yosemite, A. Gray in 1872; Ostrander's, above Yosem- 

 ite, Bolander 5029 ; Mt. Dana, Bolander 6185 ; meadows on Soda 

 Creek, Tulare County, 8-9,000 feet, Purpus 5173 ; meadows near Fare- 

 well Gap, Tulare County, 10,200 feet, Purpus 1489; Hockett's 

 meadows, Tulare County, Culbertson (B 4463) ; Alta meadows, Tulare 

 County, G. B. Grant 5320 ; Crabtree meadows, Tulare County, 10,200 

 feet, H. M. and G. R. Hall 8452. 



la. Erigeron salsuginosus var. angustifolius Gray, Proc. Am. 

 Acad., vol. 16, p. 93. 1880. 



Aster salsuginosus var. angustifolius Gray, Bot. Calif., vol. 1, p. 3,25. 1876. 

 Erigeron angustifolius (Gray) Eydb., Bull. Torr. Bot. Club, vol. 2*4, p. 295. 

 1897. 



Type locality. "Sierra County." 



Range. Coincident with the species. 



Zone. Hudsonian, and also in the Canadian. 



Specimens examined. Pyramid Peak, 10,000 feet, Brewer 2138 ; 

 Desolation Valley, Tahoe, 8,400 feet, Hudsonian Zone, Smiley 94; 

 about Marlette Lake, Washoe County, Nevada, 2,460 m., Baker 1384 ; 

 Angora Ridge, Tahoe, edge of meadow, 7,300 feet, Hall 8801 ; Bloody 

 Canon, Mono County, Congdon, C 138 ; Tuolumne meadows, Yosemite, 

 8,650 feet, R. A. Ware 2699c. 



