Rubus glandicaulis is a North American species of flowering plant in the rose family. It is native to eastern and central Canada (Québec, Ontario, and the 3 Maritime Provinces) and the northeastern and north-central United States (Wisconsin, Michigan, New York, Massachusetts, Vermont, New Hampshire, Maine).Rubus glandicaulis is an erect shrub with perennial roots and hairy and prickly biennial shoots up to 6 feet (180 cm) tall. Leaves have 3 or 5 leaflets.The genetics of Rubus is extremely complex, ...