Rubus recurvicaulis is an uncommon North American species of flowering plant in the rose family. It grows in eastern and central Canada (Ontario, Québec, New Brunswick, Nova Scotia, Newfoundland) and the north-central and northeastern United States (Minnesota, Ohio, Pennsylvania, New Jersey, New York, and the 6 New England states).Biota of North America Program 2014 state-level distribution mapBailey, Liberty Hyde 1947. Gentes Herbarum; Occasional Papers on the Kinds of Plants 7(3): 275, 278, figure 101Blanchard, William Henry 1906. Rhodora 8(92): 153–156
The genetics of Rubus is extremely complex, so that it is difficult to decide on which groups should be recognized as species. There are many rare species with limited ranges such as this. Further study is suggested to clarify the taxonomy.Flora of North America, Rubus Linnaeus, 1754. Bramble Some studies have suggested that R. recurvicaulis may have originated as a hybrid between R. flagellaris and R. pensilvanicus. Flora of North America, Rubus pensilvanicus Poiret 1804. Pennsylvania blackberry, ronce de Pennsylvanie
References