Salix lasiolepis is a species of willow tree that is native to western North America. It is a deciduous tree that can grow up to 50 feet tall and has a broad, spreading crown. The leaves are long and narrow, with a pointed tip and finely toothed edges. The bark is gray-brown and becomes deeply furrowed with age. The tree produces catkins in the spring, which are followed by small, brown capsules containing numerous tiny seeds.