﻿Rydberg: Notes on Rosaceae 145 



This I think distinct from R. florulentus. Its leaves are similar 

 but not so shining, and they are densely ferrugineous-pubescent 

 beneath. 



Santo Domingo: near Constanza, 1910, Von Tuerckheim2gij. 



Ruhus domingensis Focke, I have seen no typical material of 

 this species, but the following was so named by Dr. Focke. It does 

 not exactly agree with the description, but may be rightly deter- 

 mined. If so, R. domingensis has less coriaceous leaves than the 

 rest of the group. 



Santo Domingo : near Constanzia, 1910, Von Tuerckheimji40. 



Ruhus ursinus Cham. & Schlecht. All the species of black- 

 berries on the Pacific coast have usually been included in this 

 species. If so, the species must be a very variable one. The 

 plants of the Columbia valley have glabrous, subglobose fruit, 

 thin only sparingly pubescent leaves, and the leaves of the young 

 shoots are rarely unifoliolate. The common plant of southern 

 California has pubescent elongate fruit, thick leaves, densely 

 pubescent beneath, and those of the new shoots usually unifolio- 

 late. These two forms represent respectively R. macropetalus 

 Dougl. and R. ursinus Cham. & Schlecht. But all plants of 

 southern and central California do not have thick leaves and 

 occasionally plants are found that have glabrous fruit. These, 

 however, do not have the habit and globose fruit of R. macro- 

 petalus. These variations have caused most botanists to regard 

 all as forms of one species. I think that a better solution is to 

 admit at least five species of this group on the Pacific coast. If so, 

 what names are they to have? 



The southern Californian plant mentioned above is Ruhus 

 ursinus Cham. & Schlecht. The type was from the vicinity of 

 San Francisco, near the northern limit of the species. Dr. Focke 

 has pointed out that R. Menziesii Hook, is the same and not the 

 plant related to R. spectahilis, which Dr. Watson called R. specta- 

 bilis Menziesii. The confusion has probably been caused by the 

 fact that Dr. Hooker suggested that the flowers were pink. The 

 rest of the description, however, agrees better with R. ursinus. 

 The type of R. Menziesii was also from San Francisco, where the 

 other species grows. R. ursinus is the most common of the 



