Salix sepulcralis group inheritied from its parent the twisted and contorted branches, as well as being more cold-tolerant, as "S. babylonica" var." matsudana" is native to northern China and Korea. These trees are usually no more than tall. Leaves are finely serrulate, pubescent or silky when young. Ovaries are short and flask-shaped, not much longer than the subtending catkin scale. They are usually intermediate between the parent species, showing the typical weeping willow appearance with leaves that are pale glaucous below. But as an ornamental tree with high diversity, trees may look closer to either parent or different entirely. Salix sepulcralis group The
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