Rydberg: Notes on Rosaceae 133 



amplissima Greene is a shade-form with coarser teeth and in age 

 practically no tomentum on the lower surface of the leaves. The 

 younger leaves of the type specimen, however, are tomentose 

 beneath. 



Ruhtis melanolasius Focke is the Rocky Mountain representa- 

 tive of R. strigosus. If it should be treated as a species or a 

 geographical variety of R. strigosus is questionable. It is low in 

 stature, much more bristly and glandular, some of the bristles 

 are often stout, prickle-like, and more or less flattened but straight; 

 the leaves are thinner, light green above, the sepals are shorter 

 and broader, and the fruit is much more acid. It is rather variable. 

 Batidaea Sandhergii is the typical form; B. laetissima Greene, a 

 paler plant with light green foliage, from exposed situations in 

 Colorado; B. dacotica Greene, a nearly glandless form, and B. 

 unicolor, a shade form almost without tomentum on the lower 

 surface of the leaves; none of them worth even a varietal name, 

 scarcely worth mentioning as a form. 



Rubiis acalyphaceus (Greene) Rydb. This was based on Bati- 

 daea acalyphacea Greene. It is very problematic if this should 

 be regarded as distinct from the last species as the only difference 

 is the pubescent stems. If it were not for the fact that these 

 pubescent specimens are found in only a part of the range of R. 

 melanolasius, I should have regarded B. acalyphacea as another 

 synonym of that species. Batidaea suhcordata Greene is the more 

 common form of the same. It is the more appropriate name of the 

 species and represents the normal form, and would have been 

 used if the name B. acalyphacea had not had page priority. 



Batidaea cataphracta Greene is intermediate between B. 

 acalyphacea and B. suhcordata but depauperate and densely white 

 tomentose on the lower surface of the leaves. B. filipendula 

 Greene is a light-colored form, depauperate, with more slender 

 pedicels. 



Wyoming: Silver Gate, Yellowstone Park, 1900, Mearns 2353; 

 Lower Golden Gate, Mearns 2553; Leucite Hills, 1901, Merrill & 

 Wilcox 6y^. 



Utah: Dyer Mine, 1902, Goodding 1260. 



Nevada: Clover Mountains, 1908, Heller 9232. 



Idaho: Trinity Lake region, 1910, Macbride 659. 



