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 kusanoi Salix kusanoi Salix kusanoi is a species of willow in the family Salicaceae. It is endemic to Taiwan. It is threatened by habitat loss. It is a deciduous shrub or small tree growing to tall. The leaves are alternate, 9 cm long and 4 cm broad, with an entire margin; they are green above, and paler below with fine silky hairs along the veins. The flowers are produced in catkins in early spring before or as the new leaves appear; it is dioecious, with male and female catkins on separate plants. The male catkins are 8–9 cm long; the female