46 FLORA OF THE YELLOWSTONE NATIONAL PARK. 



Erigeron radicatus, Tlook. 



Alpine slopes, with E. uniflorus. Frequent. 



Erigeron ochroleucus, Nutt. 



Meadows along Slough Creek, 6600 ft. alt. 



Erigeron caespitosus, Nutt. 



Grassy slopes. Specimen Ridge, 8000 ft. alt.; Mud Springs (Adams). 

 Not common. 



Erigeron corymbosus, Nutt. 



Mammoth Hot Sjirings, 6400 ft. alt. ; Lower Geyser Basin (Coulter) ; 

 Mud Springs (Adams). 



Erigeron acris, L. 



Blacktail Deer Creek, 7400 ft. alt. ; Mirror Lake Plateau, 8700 ft. 

 alt. Local, 



Erigeron armeriaefolius, Turcz. 



Bogs and wet meadows. Indian Creek, 8200 ft. alt. ; Soda Butte 

 Creek, 7000 ft. alt. 



Antennaria flagellaris, Gray. 



Bare rocky ridges, Mt. Norris, 9200 ft. alt. 



Antennaria Carpathica, R. Br., var. pulcherrima, Hook. 



Common in bogs and wet meadows, from 7000-8000 ft. alt. 



Antennaria alpina, Gaertn. 



Rather common on alpine and subalpine summits. 



Antennaria dioica, Gaertn. 



Common on dry benches and ridges at low elevations. 



Antennaria dioica, Gaertn., var. rosea. 

 Gardiner, 5300 ft. alt. Rare. 



Anaphalis margaritacea, Benth. and Hook. 



Mammoth Hut Springs, 6200 ft. alt. ; YtjUowstone Lake (Adams). 

 Not common. 



Gnaphalium Sprengelii, Hook, and Arn. 



A characteristic plant of the hot spring and geyser areas. 



Iva xanthiifolia, Nutt. 



Yellowstone (Forwood). 



Iva axillaris, Pursh. 



"Hot springs along the Yellowstone" (Forwood). 



