44 FLORA OF THE YELLOWSTONE NATIONAL PARK. 



Townsendia sericea, Hook. 



Bare rocky summit of Saddle Mt., upper East Fork, 10,200 ft. alt. 

 (697); "The northern form of Hooker, with pappus of ray flowers 

 reduced" (Gray). 



Aster Sibiricus, L. 



Open dry woods. Pelican Cone, 8700 ft. alt. ; Mammoth Hot Springs, 

 6200 ft. alt. 



Aster conspicuus, Lindl. 



"With the preceding, but less frequent. Yellowstone (Parry, 

 Forwood). 



Aster integrifolius, Nutt. 



Meadows and border of woods, common from 6500-8500 ft. alt. 



Aster campestris, Nutt. 



Mammoth Hot Springs, 6200 ft. alt. 



Aster commutatus. 



Dry benches, Cache Creek, 7500 ft. alt. ; Mammoth Hot Springs, 

 6200 ft. alt. Not common. 



Aster longifolius, Lam. ? 



Border of bogs, Gardiner River, 6200 ft. alt. Rare. 



Aster adscendens, Lindl. 



Rather common, from 6000-8000 ft. alt. ; Stevenson Island, Yellow- 

 stone Lake ; Gibbon Meadows, 7500 ft. alt. ; Hot Sulphur Springs 

 (Adams). 



Aster Fremonti, Gray. 



Mt. Washburne, 9000 ft. alt. 



Aster foliaceus, Lindl. 



Meadows, and especially grassy slopes, from 8000-9000 ft. alt. Com- 

 mon. Turbid Lake, 7900 ft. alt. ; Mt. Holmes, 9000 ft. alt. 



Aster foliaceus, Lindl., var. apricus, Gray. 

 Bell Peak, 9000 ft. alt. 



Aster scopulorum, Gray. 



Dry rocky benches. Gardiner, 5600 ft. alt. Rare. 



Aster Engelmanni, Gray. 



Rather common on grassy slopes, from 7500-8500 ft. alt. Rays 

 always white. 



