YELLOW DRYAD 



Dryas drummondii Richardson 



As yellow dryad is usually seen by mountain visitors, its mats of 

 crinkled leaves are surmounted by fluffy seed heads, for the flowers 

 open early and last for only a brief season. The plant grows most pro- 

 fusely in gravelly glacial stream bottoms, in limestone soil. Here it 

 abounds until overwhelmed in midsummer by the high waters of 

 melting glacial ice, surviving only on portions of the stream banks 

 left undisturbed by the rushing water. The pale yellow flower always 

 turns its face downward, and does not open fully to the sunlight. The 

 dryads belong to the Rose Family. 



This species is found often at high elevations, from Quebec to 

 Montana, British Columbia, and Alaska. 



The specimen sketched was procured in the Ice River Valley, 

 twenty-five miles by trail from Leanchoil Station on the Canadian 

 Pacific Railroad, British Columbia, at an altitude of 3,500 feet. 



PLATE 364 



