FLORA OF THE YELLOWSTONE NATIONAL PARK. 53 



Androsaoe filiformis, Retz. 



With the precedm<r at low elevations. 



Centunculus minimus, L. 



Border of bogs. iVIammoth Hot Springs, 6200 ft. alt. 



GENTIANACE^. 



Gentiana serrata, Gunner. 



"Wet places, GOOO-8500 ft. alt. Common almost everywhere. 



Gentiana Amarella, L., var. acuta, ITook. 



Bogs. Indian Creek, 8000 ft. alt.; Blacktail Deer Creek, 7500 ft. alt.; 

 Cache Creek, 7G00 ft. alt. ; Heart Lake (Coulter). Frequent. 



Gentiana Forwoodii, Gray. 



Rather dry meadows, 6000-8000 ft. alt. ; Yellowstone Lake at outlet, 

 7800 ft. alt. ; East Fork, 7500 ft. alt. In lower and dryer situations 

 than Q. serrata, and much less common. 



Swertia perennis, L. 



Yellowstone Falls (Pariy) ; Yellowstone (Forwood). 



Frasera speciosa, Dougl. 



Common in meadows and on grassy slopes, from 6000 8000 ft. alt. 



POLEMONIACE^. 



Phlox canescens, Torr. and Gray. 



Grassy slopes about Swan Lake and Indian Creek, 7300 8000 ft. alt. 

 June 15, with P. Dougladi, Hook, var. longifoUa, Gray, but flowering 

 about two weeks earlier. 



Phlox Douglasii, Hook. 



Very common on subalpine and alpine slopes throughout. 



Phlox Douglasii, Hook, var. longifolia, Graj^ 



Dry slopes at lower elevations than the typo. Very common. 



Phlox longifolia, Nutt. 



Mammoth Hot Springs, 6400 ft. alt. 



Phlox longifolia, Nutt., var. brevifolia. Gray. 

 Rocks, Yellowstone Lake (Adams). 



Gilia linearis. Gray. 



Common throughout at low elevations. 



