Deciduous, dioecious, catkin-bearing trees or shrubs with tufted seeds. Widespread of temperate and arctic regions in both hemispheres. The genus Salix is the largest with some 300 species. Important as a source of firewood. Planted as an ornamental and windbreak.
Natural aspirin comes from the bark of some species.
The rationale for this is that both contain mustard-oil like Brassicaceae. Cosmopolitan, mainly of warm to cold temperate regions of both hemispheres. Schizopetaleae R. Br. There is growing evidence that the large family Capparaceae Juss. As defined by Cronquist a family of about 125 genera and 3500 species.