SEARCH Articles Figures Tables From Salix viminalis Salix alba Salix alba , bark extract Salix babylonica Salix brachycarpa Salix capraea Salix caprea Salix clones Salix discolor Salix fragilis Salix helix Salix matsudana Salix microstachya Salix purpurea Salix sachalinensis Salix sp. Salix species Salix spp Salix triandra Salix viminalis Salix viminalis cultivation Salix willow bark Willow Salix species) Willow bark (Salix spp Willow, Salix spp