ii4 Brassicaceae 



the Rockies; flowering in May and June. 



Draba Densely caespitose. Leaves lin- 



andina ear-oblong, obtuse, J of an inch 



(Nutt.) long or less, stiff and rigid, 



A. Nelson. densely imbricated, forming nu- 

 merous small rosettes: stellate-pubescent on 

 both sides. Scapes slender, 1-2 inches high, 

 few-flowered, petals pale yellow or white, J 

 of as. inch long; twice as long as the hairy 

 calyx; pods | of an inch or less long with 

 short stiff hairs. 



On exposed rocks and alpine summits 

 throughout the Rockies, frequent in the 

 vicinity of Banff, flowering in May and June. 



Caudex with numerous slender 

 Draba 

 nivalis matted branches. Leaves in 



Liljb. dense tufts, oblanceolate, acutish 



Arctic Whit- with a rather stout mid-nerve, 

 entire, white-hairy, with dense 

 stellate pubescence, not at all ciliate or 

 slightly so near the base, J of an inch long 

 or less. Scapes slender, hairy, 1-3 inches 



