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 delnortensis Salix delnortensis Salix delnortensis is a species of willow known by the common name Del Norte willow. The plant is endemic to the Klamath Mountains of northwestern California and southwestern Oregon. It is named for Del Norte County, California, its primary distribution locale. It is also endemic to serpentine soils. It grows in riparian zone and California mixed evergreen forest habitats, between . "Salix delnortensis" is a shrub growing tall. It forms thickets, sometimes quite large, some of which are made up of clones of one individual. The shrub has many branches, which are very brittle. The young twigs are