Lichen, White Willow - Salix Alba, Norwich, England, UK Stock Image

Lichen on White Willow - Salix alba, Norwich, England, UK.Salix alba, the white willow, is a species of willow native to Europe and western and central Asia. The name derives from the white tone to the undersides of the leaves. It is a medium-sized to large deciduous tree growing up to 10–30 m tall, with a trunk up to 1 m diameter and an irregular, often-leaning crown.