YELLOWSTONE NATIONAL PARK 

 (green) (white or blue) 



49 



GREEN GENTIAN 



Green Gentian (Frasera) . This is one of the 

 most curious and interesting plants in the Park. It 

 occurs freely on treeless, gravelly slopes, at the high- 

 er elevations, being one of the most conspicuous ob- 

 jects on the drive over Dunraven Pass. The stem is 

 unbranched, very stout and thick, about three feet 

 high, resembling in general outline a mullein stalk. 

 The leaves are large and broadly lance-shaped, cover- 

 ing the entire stem, and the whole plant is smooth 

 and a very pale green. The flowers, borne among the 

 leaves, on short, slender stems, have four pointed 

 petals; they also are green, mottled with darker spots. 

 They are in bloom during July and early August. 



Phlox {Phlox). This flower is found throughout 

 the Park, on dry, stony slopes in the open. It can 

 stand extreme conditions, and occurs freely on the 

 rock slides above timberline on the mountains. The 

 most frequent form of the plant is a low, cushion-like 

 mat of short, narrow, rather stiff leaves growing on 

 tangled slender stems. The numerous white flowers 

 are scattered over the surface of the mat. The lower 

 part of the flower is united into a narrow tube, opening 

 at the top into five flat, round petals. 



