368 PHANEROGAMOUS PLANTS. 



6. Senecio Andinus, Nuti. 



Hab. Washington Territory, between the Spokane and Fort Col- 

 ville ; also between the Kooskooskee and the Walla- Walla, — Accords 

 with NuttalPs own specimens ; but the leaves are mostly denticulate, 

 and none of them cordate or even abrupt at the base. 



55. TETRADYMIA, DC. 



1. Tetradymia canescens, DC. 



Hab. North fork of the Columbia, Washington Territory ; same as 

 the Douglasian plant, which was also collected by Mr. Spalding on the 

 Kooskooskee Between the Willamette and California, with rather 

 shorter leaves ; clearly uniting T. inermis of Nuttall with the original 

 species. 



56. CROCIDIUM, Hook. 



1. Crocidium multicaule, Hook. 



Hab. Oregon; the station not recorded; doubtless towards the 

 coast. 



57. ARNICA, Linn. 

 1. Arnica mollis, Hook. 

 Hab. Oregon or Washington Territory ; the station not given. 



2. Arnica latifolia, Bong. 



3. Arnica cordifolia, Hook. 



Hab. Washington Territory; the station not recorded, but both 

 species are common in all the woody region. 



