Two old blackberries (Rubus L., Rosaceae) from the region of the Chartreuses in South-East France

Rubus hybridus Vill. and R. nigricans Danthoine, both from South-East France, were described in the eighteenth century. They are typified here and their identities investigated. The former initially seemed identical with R. praedatus Schmidely (which is also typified here), but finally turned out to be a species that was not described by any later author. Rubus nigricans is identical with R. bellardii Weihe (= R. pedemontanus Pinkw.).