130 Rydberg: Notes on Rosaceae 



occupied, Focke in 191 1, substituted R. transmontanus , but mis- 

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

 the meantime Dr. Greene had named it Melanohatiis nigerrimiis* 

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

 western R. leucodermis, 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. strigosiis. 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, Sandberg 1173 (type of Batidaea 

 Itascica Greene). 



Connecticut: Bridgeport, Earner 50530. 



North Dakota: Minot, 1907, Lunell. 



Riibus 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.f 



Idaho: Cedar Mountain, Latah County, Piper 2879. 



Rubus arizonicus (Greene) Rydb. {Batidaea arizonica Greene). 



* The other two species of Melanobatus of Greene, viz., M. neglectus and M. 

 mickiganus, are based on a hybrid, R. occidentaUs Xsirigosus {R. neglectus Peck), the 

 former being the more common form, resembling most one parent, R. occidentaUs, 

 while the latter represents the form more like R. slrigosus. - 



t See Rhodora 2: 198. 1900. 



