The Gray willow (Salix cinerea) belongs to Salicaceae (the Willow family). It is a small deciduous tree that is native to Europe and western Asia. This tree grows in damp woodlands, beside rivers and streams, and can reach 4-15 m in height. The leaves are obovate or broadly oblanceolate, and spirally arranged. It is dioecious. The catkins flower from April to May. The male catkins are gray at first, turning yellow when the pollens are developed. The female catkins are greenish-gray. maturing in early summer to release the numerous tiny seeds.