The pretty shrub called el-egl droops beneath the rocks of Silsilis over the water, accompanied sometimes by a dwarf willow; and the sandy earth, washed down the gullies on the western bank in winter, produces a plentiful crop of the sakarân a plant bearing a seed which has intoxicating qualities, as the name imports, and which is said to be used by robbers to poison or stupify persons whom they wish to rifle at their leisure.