Salix babylonica grown weeping willow cultivar is "Salix × sepulcralis" 'Chrysocoma', with bright yellowish branchlets. Peking willow is a popular ornamental tree in northern China, and is also grown for wood production and shelterbelts there, being particularly important around the oases of the Gobi Desert, protecting agricultural land from desert winds. The epithet "babylonica" in this Chinese species' scientific name "(S. babylonica)," as well as the related common names "Babylon willow" or "Babylon weeping willow", derive from a misunderstanding by Linnaeus that this willow was the tree described in the "Bible" in the opening of Psalm 137 (here in Latin and English
Salix nigra as a photodegradation tool. Photodegradation is theorized to work by drawing the target chemical up the roots and stem into the leaves where it is degraded by higher energy radiation provided by the sun. Salix nigra Salix nigra, the black willow, is a species of willow native to eastern North America, from New Brunswick and southern Ontario west to Minnesota, and south to northern Florida and Texas. It is a medium-sized deciduous tree, the largest North American species of willow, growing to tall, exceptionally up to , with a trunk diameter. The bark is dark brown to blackish, becoming fissured