﻿130 Rydberg: Notes on Rosaceae 



occupied, Focke in 191 1, substituted R. 

 applied the name to another species related to R. pubescens. In 

 the meantime Dr. Greene had named it Melanobatus nigerrimus* 

 It is more closely related to the eastern R. occidentalis than to the 

 western R. leucodertnis, but differs from both in the lack of tomen- 

 tum. The following specimens have been seen: 



Washington: Wawawai, 1894, Piper 1788; 1897, Piper; Ala- 

 mota, 1894, Piper 1553; damp woods, Columbia River, West 

 Kickitat County, 1883, Suksdorf (both in flowers and fruit). 



Ruhus idaeus L. This European species is sometimes culti- 

 vated in this country and has occasionally established itself. It 

 has not a trace of glandular bristles. The inflorescence has small 

 weak prickles, sometimes bristle-like but never gland-bearing. 

 In cultivation forms are found with the habit of R. idaeus with a 

 few glandular hairs, but these forms are to be regarded as hybrids 

 between it and R. strigosus. Batidaea Itascica Greene is evidently 

 a synonym of this species. The following specimens belong here : 



New York: 1879, L. F. Ward. 



Washington: Watesburg, 1897, Horner 160. 



Minnesota: Lake Itasca, Sandherg iiyj (type of Batidaea 

 Itascica Greene). 



Connecticut: Bridgeport, Eames 5053a. 



North Dakota: Minot, 1907, Lunell. 



Ruhus melanotrachys Focke. This was described seventeen 

 years ago by Focke. In the same article he treats it both as a 

 species and as a subspecies of R. idaeus. Of all the North Amer- 

 ican forms this is closest to R. idaeus, being non-glandular, but 

 the young branches, petioles and inflorescence are sparingly pilose 

 or glabrate, instead of finely tomentose. The only specimen seen 

 by me is the following, which has been referred to R. idaeus by 

 Fernald.j 



Idaho: Cedar Mountain, Latah County, Piper 287Q. 



Rubus arizonicus (Greene) Rydb. {Batidaea t 



er being the m. 

 f See Rhodora 2 



