Perennial tree of the Willow family-salicaceae- up to 25m. Erect stems, dark greyish. Young branches silky. Grey silvery leaves, serrate, till 10 cm long, covered with soft hairs on both sides. Flowers in catkins; male ones, cylindrical, yellow till 8 cm; female ones, till 6 cm, green at the beginning but becoming white when full of seeds. By the side of the rivers, channels and woods of humid climate.