Salix babylonica a gold-yellow in autumn. The flowers are arranged in catkins produced early in the spring; it is dioecious, with the male and female catkins on separate trees. "Salix babylonica" was described and named scientifically by Carolus Linnaeus in 1736, who knew the species as the pendulous-branched ("weeping") variant then recently introduced into the Clifford garden in Hartekamp in The Netherlands. Early Chinese cultivar selections include the original weeping willow, "Salix babylonica" 'Pendula', in which the branches and twigs are strongly pendulous, which was presumably spread along ancient trade routes. These distinctive trees were subsequently introduced into England from Aleppo in
Salix bicolor June. It is present in mountains of Southern Europe. This species can be found near streams, waterways and moist subalpine pastures at elevation of above sea level. Salix bicolor Salix bicolor is a species of flowering plant in the family Salicaceae (willows). "Salix bicolor" can reach a height of . This plant usually develop into a large shrub, but may grow as a multi branched tree of up to 4 m height. Branches are glabrous. brown-reddish or chestnut. Leaves are yellow-green, glabrous, elliptical or lanceolate with acute apex. They are long and wide. The catkins are produced in early spring,