166 Rydberg: Notes on Rosaceae 



15. Rosa Durandii Crepin 



This was based on E. Hall 146, which was referred to Rosa 

 kamtschatica by Dr. Gray. Dr. Watson in his monograph reduced 

 it to a synonym of R. Nutkana. Crepin, probably influenced by 

 Watson's treatment, later retracted his species. In my opinion 

 R. Durandii is perfectly distinct from R. Nutkana. The leaves 

 are thicker, more hairy than in that species, and rarely double- 

 toothed; the prickles are not like those of R. Nutkana, but curved, 

 short, strongly flattened and pubescent. As long as only Hall's 

 specimens were known, the specimens might have been regarded 

 as freaks, but specimens almost exactly like these have since been 

 collected. 



Oregon: E. Hall 146; Brownville, 1895, Canby; near Spring- 

 field, Coville & Applegate 1076. 



British Columbia. Queen Charlotte's Island, Dawson 



Si 44 (?)• 



Idaho: Lower Priest River, Leiberg 288 j. This specimen is 

 very peculiar, nearly unarmed, but with the pubescence of the 

 leaves and twigs of R. Durandii. 



16. Rosa Columbiana Rydberg 



This also is related to R. Nutkana but differs in the strongly 

 curved prickles. It is a rather local plant, the following specimens 

 belonging here: 



Idaho: Little Potlatch River, 1892, Sandberg, MacDougal & 

 Heller 381; Kooteney County, Sandberg. 



Oregon: Forest Grove, 1893 and 1894, Lloyd. 



17. Rosa myriadenia Greene 

 This species has the habit, toothing, and glandular pubescence 

 of R. muriculata, but the leaflets are smaller and the prickles are 

 decidedly curved; these characters would place it in the key 

 next to R. columbiana. From this it differs in the smaller and 

 more pubescent leaves. It is known only from the type locality, 

 Huckleberry Mountains, Jackson County, Oregon. 



18. Rosa califorxica Cham. & Schlecht. 

 This Californian species has been collected in the extreme 

 southern part of Oregon. 



