CRUCIFER.E. 233 



14. DRABA, Linn. 



1. Drab a nemorosa, Linn. 



Hab. Port Discovery, Puget Sound (var. hebecarpa) ; mountains of 

 Oregon (specimens without fruit). 



2. Drab a Caroliniana, Walt. 



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Hab. On the Columbia River, near Fort Walla- Walla. — A widely 

 diffused species east of the Mississippi, but no station west of the 

 Rocky Mountains has been hitherto recorded. 



15. T H L A S P I, Dill. 



1. Thlaspi cochleariforme, DC. 



Hab. Interior of Oregon, — Plant nearly a foot high, branching 

 from the base. Raceme elongated in fruit. Pedicels about twice the 

 length of the mature pods. Cells of the pod 4-7-seeded. Our plant 

 seems to be hardly distinct from T. alpestris, and it clearly includes T. 

 Fendleri, Gray. 



16. L E P I D I U M, Linn., R. Br. 



1. Lepidium ruderale, Linn. 



Hab. Valley of the Columbia River. — The pods are somewhat 

 scabrous-pubescent; especially on the margin. [Probably L. inter- 

 medium, Gray, PI. Wright., which is the common Western species.] 



2. Lepidium Menziesii, DC. 



Hab. In various parts of Washington Territory, commonly near 

 the sea. — The leaves are variable : sometimes all of them nearly 



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