Rubus segnis is an uncommon North American species of flowering plant in the rose family. It grows in eastern Canada (all 3 Maritime Provinces) and the northeastern United States (Maine, New Hampshire, Vermont, Massachusetts). Nowhere is it very common.Biota of North America Program 2014 county distribution mapBailey, Liberty Hyde 1941. Gentes Herbarum; Occasional Papers on the Kinds of Plants 5(2): 84
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. segnis may have originated as a hybrid between R. flagellaris and R. hispidus.Flora of North America, Rubus hispidus Linnaeus, 1753. Bristly or swamp dewberry, ronce hispide
References