164 Rydberg: Notes on Rosaceae 



6. Rosa Butleri Rydberg 



This species belongs to the Rocky Mountain region and was 

 originally described from northwestern Montana. The following 

 specimens from British Columbia are referred here: 



British Columbia: Camloops, May 24, 1912, A. Thorpe. 



7. Rosa acicularis Lindl. 



See Bull. Torrey Club. 47: 56. 1920. This is a common 

 species throughout the northern Rockies and the Cascade Moun- 

 tains. 



8. Rosa Bourgeauiana Crepin 



See notes in Bull. Torrey Club 47: 57. 1920. In the Columbia 

 region, this species has been found only north of the Canadian 

 boundary. 



British Columbia: Okanogan Landing, Golden, Pense; Skeena 

 River, /. K. Henry. 



9. Rosa anacantha Greene 



This species is related to the eastern R. blanda, but differs in 

 the crenate instead of serrate leaflets and the smaller fruit. It is 

 known only from the type locality, in salt marshes near Tacoma, 

 Washington. 



10. Rosa MacDougalii Holz. 



This is regarded by many as a form of R. Niitkana. It differs 

 not only in the hispid fruit but also in the fact that the teeth of 

 the leaflets are seldom double as they are in R. Niitkana and the 

 leaflets are rarely glandular-granuliferous. Neither could it be 

 referred as a form of R. Spaldingii, for in the latter the leaflets are 

 pubescent beneath. The following specimens belong here: 



Idaho: Landing-Cuprum road 1901, Cusick 2533, 2352; 

 Farmington Landing, 1892, Sandberg, MacDougal & Heller 572, 

 Heller 3256. 



Oregon: Rye River Valley, Leiberg 4410. 



Washington: Pullman, 1896, Elmer 72, 74. 



11. Rosa yainacensis Greene 

 Until lately this species was known only from the type locality. 

 The habit, long prickles, and large fruit suggest R. Niitkana, but 



