The term 'Basket Willow' refers to two species of willow trees, Salix viminalis (OSIER) and Salix purpurea (redosier). OSIER is a deciduous shrub or small tree with long, flexible branches that are used for basketry and weaving. Redosier is a larger shrub or small tree with reddish-brown bark and long, flexible branches that are also used for basketry and weaving. Both species are native to Europe, Asia, and North America.