﻿Rydberg: Notes on Rosaceae 471 



that R. Rosshergianus is a hybrid of R. frondosus and R. procum- 

 bens, but the habit is intermediate between the two; the leaves 

 resemble in form those of R. frondosus, but are harsher; and the 

 stem is light colored, tough and prickly as in R. procumbens. Both 

 are found in the region. 



Connecticut: Southington, 1905, Blanchard 8q, set 1-3; 

 Graniteville, Blanchard 8q, set 3; Canton, Blanchard 89, set 5; 

 Southington, 1904, Andrews 21, 22, 23, 31, 33, 35. 

 New Jersey: Tuckerton, Mackenzie. 



Rubus frondosus X hispidus. Also one of Mr. Bicknell's 

 hybrids, collected only at the original station and vicinity, Bick- 

 nell 43.69. 



Rubus canadensis X recurvans. The specimens from which 

 R. recurvans subrecurvans was described approach R. canadensis 

 L. in so many respects, such as the form of the leaves, the inflores- 

 cence, and the weakly developed armature of the stems, that I 

 have regarded it as a hybrid with that species. 



Maine: Kennebunkport, 1905, Blanchard 71; York Beach, 

 1909, Blanchard 516. 



Rubus Brainerdi X vermontanus. The specimens referred to 

 this hybrid were collected at the type station of R. Brainerdi 

 and together with it. R. vermontanus is common in the region. 

 Vermont: Weybridge, Brainerd; also 1902, Eggleston 2894. 

 Rubus amicalis X pergratus. No specimens except the origi- 

 nal ones have been seen. 



Rubus argutus X canadensis. This was first recorded by 

 myself from southwestern Virginia, but similar specimens have 

 also been collected in the north. 



Virginia: road between Marion and White Top Mountain, 

 1908, Rydberg 8099; Chattam Hill Road, 1892, Small. 



North Carolina: Biltmore, 1909, Crafton & Eggleston, 4416. 

 New Jersey: Greenwood Lake, 1907. Mackenzie 2675; 

 Ogdensburg, 1910, Mackenzie 4625. 



Rubus canadensis X Randii. This was first recorded by 

 myself from the Adirondacks, where both parents grow. 



New York: Little Moose Lake, 1906, Rydberg 7818; 7S20; 

 Twin Lakes, Rydberg 7S42; East Lake, Rydberg 7861. 



