248 UNIVERSITY OF MISSOURI STUDIES [396 



IDAHO to BRITISH COLUMBIA; COLORADO to WASHINGTON. 



1146. A. tridentata Nutt. COMMON SAGE-BRUSH. 



Barren mountain slopes near Bluebird Mine, between 

 Glacier lake and Eldora, 8500-9500 ft. (Daniels). 



NEBRASKA and MONTANA to BRITISH COLUMBIA; COLORADO 

 to CALIFORNIA. 



472. PETASITES Tourn. SWEET COLTSFOOT. 



1147. P. sagittata (Pursh) Gray. ARROW-LEAVED SWEET 

 COLTSFOOT. 



Eldora to Baltimore (Rydberg). Eldora lake, May, 1910 

 (W. W. Robbins). 

 LABRADOR to ALASKA; MINNESOTA to COLORADO. 



473. ARNICA L. ARNICA. 



1148. A. platyphylla A. Nels. BROAD-LEAVED ARNICA. 

 Arapahoe Trail just below timberline on Arapahoe Peak, 



9000-10500 ft. (Daniels, 948). 



MONTANA and IDAHO to COLORADO. 



1149. A. pumila Rydb. [A. parvifolia Greene]. DWARF AR- 

 NICA. 



Gregory Canon, 6600 ft. (Daniels, 903). 

 WYOMING to COLORADO and UTAH. 



1150. A. cordifolia Hook. HEART-LEAVED ARNICA. 



In the wooded region throughout, 6000-11000 ft. (Dan- 

 iels, 270). Also Eldora to Baltimore; between Sunshine and 

 Ward; and Massif de T Arapahoe (Rydberg). 



MONTANA to BRITISH COLUMBIA ; COLORADO to CALIFORNIA. 



1151. A. Rydbergii Greene. RYDBERG' s ARNICA. 

 Eldora to Baltimore (Rydberg). 

 MONTANA to COLORADO. 



1152. A. subplumosa Greene [A. Chamissonis longinodosa A. 



Nels.]. SUBPLUMOSE ARNICA. 



Boulder Canon above the Falls, 7000-8000 ft. (Daniels, 537). 

 MONTANA to COLORADO. 



1153. A. pedunculata Rydb. PEDUNCLED ARNICA. 



Under pines in the mesas south of the Chautauqua grounds, 



