Potentilla fruticosaL. (Rosaceae) is a complex of large morphological, karyological, geographical and ecological amplitudes. A survey of the distribution of the morphological variation is given and the underlying reasons discussed. Migration paths are also discussed. In southeast central Asia there is a complex in need of further investigation. Outside this area two species should be recognized, a diploid and hermaphrodite species,P. floribundaPursh, in N America, S Europe and Siberia and a tetraploid and dioecious species,P. fruticosaL., in N Europe and Siberia.
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