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 lemmonii edges, and hairless and waxy or slightly hairy. The inflorescence is a stout catkin of flowers a few centimeters long, the female catkins lengthening to 6 or 7 centimeters as the fruits develop. This willow sometimes hybridizes with "Salix geyeriana", to which it is closely related. This shrub is commonly used in revegetation projects in its native range, where it is useful for stabilizing eroded riparian habitat. Salix lemmonii Salix lemmonii is a species of willow known by the common name Lemmon's willow, named after J.G. Lemmon. It is native to western North America from British Columbia to California to