134 Rydberg: Notes on Rosaceae 



Ruhiis peramoenus (Greene) Rydb., based on Batidaea per- 

 amoena Greene, differs from R. melanolasius in the more slender 

 habit, in the less numerous bristles, but above all in the narrower, 

 gradually long-acuminate sepals. The leaves are thin, almost 

 without tomentum beneath. It is represented by specimens from 



Idaho : Leiherg 1105; Sandherg, MacDougal & Heller 2^p. 



Montana: Kirkwood & MacDougal 263, 264. 



Oregon: Brown 85, 88; Cusick 17 2g; Sheldon 8 161. 



Washington: Spokane, Piper 2268. 



British Columbia: Dawson 7040. 



Ruhus viburnifolius (Greene) Rydb., Batidaea vihurnifolia 

 Greene, differs from the last only in being lower, densely bristly, 

 leaves strongly plicate and strongly veined. It therefore stands 

 nearer R. melanolasius than R. peramoenus does, but it has the 

 narrow sepals of the latter species. It may be a high mountain 

 and subarctic form of R. peramoenus. 



The following specimens belong here : 



British Columbia: Glazier, igog, Rusby; Similkameen River, 

 /. ilf. Macoun 6gg7o; Emerald Lake, Shaw 136; Roger's Pass, 

 1904, Shaw 472. 



Alaska: Lake Illiamna region, 1902, Gorman 26; Rampart, 

 1901, Jones 44, 36; Kenai, 1901, Nielson 47; Yukon River, 1903, 

 Hollick. 



Yukon: fifty miles above Stuart River, 1899, Gorman 10Q3; 

 Hunter Creek, John Macoun 58470; Dawson, Williams i; Tarle- 

 ton 162b. 



Montana: Gallatin River, 1905, Blankinship 163; Midvale, 

 Umbach 373. 



Alberta: base of Tunnel Mountain, 1897, McCalla 2og6; 

 Lake Louise, J . M. Macoun 65104. 



Rubus subarcticus (Greene) Rydb., Batidaea subarctica Greene. 

 Most of the high northern specimens of what have been called R. 

 strigosus have more or less pubescence on the inflorescence and 

 young parts of the stem and branches; the stem is also much 

 more glandular-bristly, and the sepals broader, shorter and more 

 abruptly acuminate. If these forms should be separate from R, 

 strigosus or not is hard to tell. I hesitated^ foe a long time in 

 giving them a name, but I found that they grew commonly in 



