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 orestera is a stout catkin of flowers. Salix orestera Salix orestera is a species of willow known by the common name Sierra willow, or gray-leafed Sierra willow. It is native to the Sierra Nevada of California and western Nevada, where it grows in moist areas in high mountain subalpine and alpine climates. It can also be found in Oregon. "Salix orestera" is very similar to "Salix glauca" and is sometimes included within that species. It is a shrub reaching one half to two meters tall, bushy with slender branches. The lance-shaped leaves are up to 9.5 centimeters long and often have