Salix spp. Height: depending on the species, shrub-like to larger tree Trunk: fast-growing, often hollow inside Leaves: elliptical to lanceolate, pointed, alternate Flowers: catkin-shaped Other: 300 to 400 species worldwide, around 30 to 40 different willow species in Germany, usually with strong elasticity of the branches SilberweidePhoto: Martina Gehret SilberweidePhoto: Martina Gehret