composite. 369 



4. Arnica alpina, Vahl., var. 



Hab. North fork of the Columbia Eiver. — A tall variety, one of 

 those which approach the narrower-leaved forms of A. Ghamissonis. 



58. CENTAUREA, Linn. 



1. Centaurea Melitensis, Linn. 



Hab. San Rafael, California. Doubtless adventive from Europe. 



59. C I R S I U M, Town. 



1. ClRSIUM FOLIOSUM, DC. ? 



Hab. Between the Spokane and Fort Colville, Washington Ter- 

 ritory (specimen imperfect) : Kooskooskee to Walla- Walla. 



2. ClRSIUM REMOTIFOLIUM, DO. 



Hab. Nisqually, and Gray's Harbor, Washington Territory. 



3. Cirsium undulatum, Spreng. 



Hab. Oregon, and Northern California. — A variable and confused 

 species, of unsettled limits ; the forms with smaller and more globu- 

 lar heads include G. canescens and G. Hooherianum of Nuttall. 



4. Cirsium altissimum, Spreng.? 



Hab. Washington Territory, between the Cascade Mountains and 

 the Columbia River. 



. . 93 



