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 OS Transifex. The Salix Wiki was created as a source of information online and the Salix startup guide is available to help newcomers get familiar with the system. Salix OS Salix OS is a multi-purpose Linux distribution based on Slackware. Salix OS retains full backwards compatibility with Slackware. This enables Slackware users to benefit from Salix repositories, which they can use as an "extra" source of software for their distribution. However, while in the KISS principle that Slackware adheres to, "Simple" refers to the system design, Salix OS applies it to daily use as well. It aims to be simple, fast