Hybrids with several other willow species are common, notably with Salix cinerea (S. × reichardtii), Salix aurita (S. × multinervis), Salix viminalis (S. × smithiana), and Salix purpurea (S. × sordida).
Unlike almost all other willows, pure specimens do not take root readily from cuttings; if a willow resembling the species does root easily, it is probably a hybrid with another species of willow [REF].