First Report on the Flora of Wyoming. 139 



some creeks reaching the dignity of small trees and furnishing ex- 

 cellent fuel. 



Boulder Creek, August 25, 1894 (No. IJll). 



Artemisia trifida, Nutt. 1. c 



No specimens of this species are at hand but it is known to be in 

 the state. 



Noted by Prof. W. C. Knight, on Seminoe Mountains, May 6, 

 1896, at about 8,000 ft. altitude. 



Petasites sagittata, Gray, in Brew. & Wats. Bot. Cal. i, 407 (1876). 

 Tussilago sagittata, Pursh. 

 Rare ; in a wet, boggy meadow. 

 Pole Creek, May 25, 1894 (No. 81). 



Arnica alpina, Olin. Mon. Arn. Upsala (1799). 



Very abundant about Table Mountain, where it was collected 

 June 2, 1894 (No. 148); June 30, 1895 (No. 1383). 



Arnica amplexicaulis, Nutt. Trans. Am. Phil. Soc. vii, 408. 

 Frequent in copses in fertile subalpine valleys. 

 Teton Mountains, August 21, 1894 (No. 933); Centennial Hills, 

 August 19, 1895 (No. 1702). 



Arnica Chamissonis, Less. Linnasa, vi, 317 (1831). 

 Frequent in the mountains. 



Pine Creek, by B, C. Bufum ; Union Peak, August 13, 1894 (No, 

 995); La Plata Mines, August 23. 1895 (No. 1785). 



Arnica cordifolia, Hook. Fl. Bor. Am. i, 331 (1833). 



Exceedingly abundant ; in woods and copses in the mountains 

 from their bases to their summits. Somewhat variable, the radical 

 leaves often reduced and ovate rather than cordate. 



Horse Creek June 9, 1894 (No. 215); Union Pass, August 10, 

 1894 (No. 871); also from the Centennial Valley. 



Arnica foliosa, Nutt. Trans. Am. Phil. Soc. vii, 407. 



Probably rare; collected only on upper Wind River, August 10, 

 1894 (No. 766). 



Arnica foliosa incana, Gray, Bot. Cal. i, 416 (1876). 



Specimens from Pine Creek, by Prof. B. C. Buffum, presumably 

 nearly typical ; others less so from Saratoga, July 2, 1893, by J. D. 

 Parker. 



