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 warburgii have a similar situation, and these special willow plants are also known as tropical willow. Salix warburgii in Taiwan's distribution is low Elevation of the shrub and the river bank, because the cutting method is easy to survive so there is no artificial introduction of cultivation. A relatively small deciduous tree, "Salix warburgii" usually grows to a height between about .The bark is grey, and the leaves are ovate with serrated edges. The back of the leaves is also, like the bark, grey. "Salix warburgii" grows in the water. Due to the thin skin, it couldn't live without water. Because