FLORA OF THE YELLOWSTONE NATIONAL PARK. 47 



Rudbeckia occidentalis, Nutt. 



Along streams and wet slopes on border of woods. Panther 

 Creek, 8200 ft. alt. ; Obsidian Canon, 7500 ft. alt. Rare. 



Balsamorrhiza sagittata, Nutt. 



Open grassy slopes up to 8500 ft. alt. Common. 



Wyetbia helianthoides, Nutt. 



Wet meadows, Indian Creek, 8200 ft. alt. Rare in the Park, but 

 common on its northwest borders, along the Gallatin River. 



Gymnolomia multiflora, Benth. and Hook. 



Mammoth Hot Springs, 6800 ft. alt. ; Yellowstone Lake (Adams). 

 Rare. 



Helianthus Nuttallii, Torr and Gray. 



In water or wet soil. Gardiner, 6300 ft. alt. ; Mammoth Hot Springs, 

 6200 ft. alt. ; Alum Creek (Forwood) ; Lower Geyser Basin (Coulter j. 

 Not common. 



Helianthella quinquenervis, Gray. 



Grassy slopes. Soda Butte Creek, near eastern boundary of the Park, 

 7800 ft. alt. 



Helianthella Douglasii, Torr and Gray. 



Very common on grassy slopes, from 6000-9000 ft. alt. 



Madia glomerata, Hook. 



Common in dry meadows up to 8500 ft. alt. 



Eriophyllum caespitosum, Dougl. 



Rocky banks on the borders of timber. Rather common. 



Chaenactis Douglasii, Hook and Arn. 



Mammoth Hot Springs, 6200 ft. alt.; Sand beaches, Yellowstone 

 Lake, 7740 ft. ; Fire-hole River (Coulter) ; Upper Geyser Basin 



(Forwood). 



Gaillardia aristata, Pursh. 



Open woods. Mammoth Hot Springs, 6200 ft. alt. Rare. 



Achillea millefolium, L. 

 Common everywhere. 



Artemisia dracunculoides, Pursh. 



Dry banks and sandy lake shores. Indian Creek, 7500 ft. alt. ; Sand 

 beaches, Yellowstone Lake, 7740 ft. alt. ; Yellowstone River (Coulter). 



