Rubus mollior is an uncommon North American species of brambles in the Rosaceae. It grows in the central United States (Missouri, Oklahoma, Arkansas, Kansas). Biota of North America Program 2014 county distribution mapBailey, Liberty Hyde 1945. Gentes Herbarum; Occasional Papers on the Kinds of Plants 5(9): 693–695, figure 312
The genetics of Rubus is extremely complex, so 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
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