DOUBLE BLADDERPOD 
Physaria didymocarpa (Hooker) Gray 
The double bladderpod is a curious plant of unusual appearance. It 
thrives best in dry limestone soils on steep mountain sides, or in the . 
deposits of glacial streams. The many pale blue-green leaves form a 
rosette upon the surface of the soil, from which spring the delicate 
gray stems bearing four-petaled yellow flowers. The root is long, thick, 
woody, and tough. In its aspect the plant suggests an alpine species. 
It belongs to the Mustard Family. 
Double bladderpod ranges from Colorado to Utah and northward 
to Saskatchewan and Alberta. 
The specimen sketched grew neat Lake tied seven miles 
from Banff, Alberta, Canada, at an altitude of 4,500 feet. 
PLATE 167 
