The safsaf willow may also be called Salix mucronata subsp. subserrata (www.aluka.org). The tree can grow to 7 m, but its riparian habitat often causes it to veer in the direction of river flow or even be positioned partly prostrate. The narrowly lanceolate leaves are simple, alternate and sometimes scattered along the length of branch. The shorter of the flower spikes are the female ones. This tree is found in many parts of Africa (Coates Palgrave).