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
Phyllonorycter salicifoliella Phyllonorycter salicifoliella Phyllonorycter salicifoliella is a moth of the Gracillariidae family. It is widespread across North America, from Mississippi to Ontario in the east and from southern California to northern British Columbia in the west. The length of the forewings is 3–4 mm. Adults are on wing from July to mid-August and again from late August to November in two generations. The larvae mostly feed on "Salix" species, including "Salix alba", "Salix amygdaloides", "Salix babylonica", "Salix bebbiana", "Salix bonplandiana", "Salix caroliniana", "Salix eriocephala", "Salix lasiolepis", Salix "longifolia", "Salix lutea", "Salix monticola", "Salix purpurea", "Salix x rubens" ("Salix alba" x "Salix