386 University of California Puhlications in Botany [Vol. 9 



Range. — British Columbia to eastern Quebec and south to New 

 Hampshire, Colorado, Utah, and California. 



Zone. — Canadian and Hudsonian. 



Specimens examined. — Sierra Nevada, Brandegee ; Summit Valley, 

 8,000 feet, Pringie, September 23, 1882; rocky height above Cold- 

 stream, Nevada County, 8,000 feet, Sonne, August 12, 1888 ; Castle 

 Peak near the highest point, 9,000 feet. Heller 7098 ; Mt. Rose, 10,000 

 feet, Kennedy 990; Castle Peak trail, 8,300 feet. Smiley 489; Glen 

 Alpine Creek, Tahoe, 7,700 feet. Hall 8816*; Maggie's Peaks, Tahoe, 

 7,100 feet. Hall 8811 ; moist open ground near Donner Lake, E. L. 

 Greene 475; Velma Lakes, Tahoe, 8,000 feet, Hall 8807; Cloud's Rest, 

 Yosemite, 8,100 feet. Smiley 510 ; Mt. Dana, Bolander 6134 ; east side 

 of Lake Tenaya, Yosemite, 8,300 feet. Smiley 685;* North Fork of 

 the Kaweah, Tulare County, Culbertson (B4521);* Alta meadows, 

 Tulare County, Mrs. Brandegee, August 6, 1905 ; Mt. Silliman, Tulare 

 County, Mrs. Brandegee, August, 1905. 



4a. Arnica mollis var. scaberrima (Greene), comb. nov. 



A. scaberrima Greene, Pitt., vol. 4, p. 165. 1900. 



Type locality. — "From Little Kern Fiver, at an altitude of 9,000 

 to 10,000 feet. " 



Range. — Probably coincident with that of the species; only speci- 

 mens from the Sierra have been carefully compared by me. 



Zone. — Hudsonian ? 



Specimetis examined. — Half-Moon Lake, Tahoe, 8,200 feet. Hall 

 and Chandler 4701 ; moist places near Little Kern River, Tulare 

 County, 9-10,000 feet, Purpus 5260. 



The form of the species, here accepted as the var. scaberrima, 

 differs from the typical state in having the usually soft pubescence 

 replaced by short scabrid hairs, the plants becoming harsh to the 

 touch, and also by the leaves becoming more or less saliently toothed 

 and so approaching the following species. 



5. Arnica amplexicaulis Nutt., Trans. Am. Phil. Soc. II, vol. 7, 

 p. 408. 1841. 



Type locality. — "On the rocks of the Wahlamet at the Falls," 

 Oregon. 



* These collections present plants conforming to the description of A. sub- 

 plumosa Greene (Pitt., vol. 3, p. 104. 1898), a species described from the moun- 

 tains of Colorado and presumed to differ from A. mollis by the pappus hairs being 

 somewhat plumose. The unsubstantial nature of the basis for this description 

 has been indicated by Dr. Eydberg (Bull. Torr. Bot. Club, vol. 37, p. 461). 



