Willow are very cross-compatible, and numerous hybrids occur, both naturally and in cultivation. A well-known ornamental example is the weeping willow ("Salix × sepulcralis"), which is a hybrid of Peking willow ("Salix babylonica") from China and white willow ("Salix alba") from Europe. The hybrid cultivar 'Boydii' has gained the Royal Horticultural Society's Award of Garden Merit. Numerous cultivars of "Salix" L. have been developed and named over the centuries. New selections of cultivars with superior technical and ornamental characteristics have been chosen deliberately and applied to various purposes. Most recently, "Salix" has become an important source for bioenergy production and for
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