WHITE DRYAD 
Dryas octopetala Linnaeus 
White dryad 1s a very decorative plant in its chosen habitat. It flout- 
ishes best in a soil of disintegrated limestone, and it is also found cling- 
ing to rough limestone rocks, where it forms close mats, its green foli- 
age hiding the interlaced masses of woody stems and dead leaves 
beneath. Above these mats the beautiful cup-shaped flowers with their 
golden centers are borne on dainty stems from one to four inches tall. 
The flowers attract many bees and small flies. The stems and leaves 
ate sticky, and have a resinous odor. 
White dryad belongs to the Rose Family, and is found from Lab- 
tador and Greenland throughout Arctic America, and in the Rocky 
Mountains from Utah and Colorado to British Columbia. It occurs 
also in northern Europe and Asia. 
Thesketch was made from plants that grew in Skoki Valley, fifteen 
miles by trail from Lake Louise, Alberta, Canada, at an altitude of 75500 
feet. 
PLATE 176 
