﻿158 Rydberg: Notes on Rosaceae 



Bailey regarded this and R. Baileyanus identical, and Mr. Blanch- 

 ard includes it in R. procumhens. Mr. Bicknell and myself think 

 it distinct. It has the thin leaves of R. Baileyanus, but they are 

 narrower and almost glabrous. The leaves of the new shoots are 

 often but three-foliolate and the shoots themselves are often erect 

 at first. The thin leaflets of a different shape distinguish them. 

 In the southern states it is, next to R. trivialis, the most common 

 dewberry. The following northern specimens belong to it. 



Missouri: Forest Hill Cemetery, Jackson County, 1897, 

 Mackenzie; Butler County, 1905, Bush 2562 B; St. Louis, 1878, 



New York: Bronx Park, 1906, P. Wilson. 



Massachusetts: Pine Grove, Nantucket Island, 1908, Bick- 

 nell 14; below the cliff, Nantucket Island, Bicknell 13. 



Ruhus huministratus Steud. This species was first described 

 under the name R. humifusus. As that name had already been 

 used, Steudel substituted R. humistratus . It is easily distin- 

 guished from the other Mexican species by its slender habit, 

 weak prickles and solitary flowers. 



Oaxaca: Puerto de Laskopa, 1842, Liebman 1625. 



Vera Cruz: Jalapa, 1899, Rose & Hough 4364, 4935. 



HiSPIDI 



Ruhus nigricans Rydb. This was first described as R. hispidus 

 erectus by Professor Peck. Dr. Britton thought that it was 

 identical with R. setosus Bigelow, but in separating the specimens 

 in the Torrey herbarium, he placed some specimens collected by 

 Bigelow with R. hispidus, not noticing that these were part of 

 the type of R. setosus. Britton has been followed by Blanchard, 

 Brainerd, and others. R. setosus is in reality closer to R. hispidus 

 (except for the semi-persistent leaves of the latter) than to R. nigri- 

 cans. Fernald, in the new Gray's Manual, has misunderstood R. 

 nigricans and adopted the name for R. vermontanus. R. Groutianus 

 I regard as a nearly glandless form of this species. 



Ruhus setosus was described in the second edition of Bigelow's 

 Florula Bostoniensis. Dr. Britton for some time regarded this as 

 the same as R. nigricans but later adopted Bicknell's view that it 

 was a hybrid between that and R. hispidus. Blanchard and 



