Rydberg: Notes on Rosaceae 467 



nized by Mr. Bicknell, but he used the name R. allegheniensis X 

 argutus, following Blanchard and Fernald in interpreting R. 

 allegheniensis. The plant is not uncommon and the following 

 specimens are referred here. 



New York: Lynbrook, Long Island, 1901, Bicknell 36; 

 Elizabeth town, Essex County, 1900, Macy; Bronx Park, 1896, 

 Nash; Highland Falls, 1910, Mearns 50. 



Massachusetts: Quaise, Nantucket Island, 1910, Bicknell 33; 

 Shawaukemmo Spring, Nantucket Island, Bicknell 35; Canton, 

 near Boston, 1906, Blanchard gg, set g. 

 Virginia: Rosslyn, 1897, Kearney. 

 Connecticut: Southington, 1904, Andreivs 3. 

 Pennsylvania: Tannersville, 1901, Britton. 

 New Jersey: Clifton, 1890, Nash goo; Paramus Swamp, 

 Bergen County, Nash g4y; also Mackenzie 2086. 



Rubus frondosus X nigrobaccus. This was also first recog- 

 nized as a hybrid by Bicknell, although he included in it specimens 

 which I do not think belong to it but rather to R. nigrobaccus X 

 recurvans. It was not at all unnatural that he should do so, 

 as he did not recognize R. recurvans as a distinct species. 



Massachusetts: Shawaukemmo Spring, Nantucket Island, 

 1908, Bicknell 20. 



New York: Jamaica, Long Island, 1901, Bicknell 25; Port 

 Washington, Bicknell 21, 23; Franklin Square, Bicknell ig. 



Pennsylvania: north of Philadelphia, 1906, Blanchard 100, 

 Set 6; Lancaster County, 1894, Ely. 



New Jersey: Succasunna, 1909, Mackenzie 4123. 

 Rubus canadensis X nigrobaccus. This hybrid was first recog- 

 nized by myself when I studied the blackberries in the Catskills, 

 1906, at Tannersville, where it grew together with R. nigrobaccus 

 and R. canadensis. I also saw it in the Adirondacks and in south- 

 western Virginia. 



New York: Tannersville, 1906, Rydberg 7g74; Little Moose 

 Lake, 1906, Rydberg y820a; Stanford, 1909, Taylor 712; Tanners- 

 ville, 1892, Vail; North Harpersfield, Topping 132. 



Massachusetts: Tyringham, Berkshire County, 1897, Vail. 

 Vermont: Grafton, 1902, Blanchard 1 7y;Simonsvi\{e, Blanchard 

 183; Rutland, 1902, Eggleston 2884. 



