Rubus prosper is a rare North American species of bramble.
The genetics of Rubus are extremely complex, making it difficult to decide which groups should be recognized as species. As there are many rare species with limited ranges, further study is suggested to clarify the taxonomy.Flora of North America, Rubus Linnaeus, 1754. Bramble
The species has been found in Rhode Island in the northeastern United States.Biota of North America Program 2014 county distribution mapBailey, Liberty Hyde 1943. Gentes Herbarum; Occasional Papers on the Kinds of Plants 5(5): 371–373, f. 166
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