Rubus rossbergianus is a uncommon North American species of flowering plant in the rose family. It grows in northeastern United States (Connecticut, Rhode Island, Massachusetts, Vermont). 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. Some studies have suggested that R. rossbergianus may have originated as a hybrid between R. flagellaris and R. pensilvanicus.