|This is a bushy, round, compact deciduous shrub, to 3' tall and 5' wide. Young branches are woolly and whitish, thick when mature. Leaves are widely round with wavy margins, deep green to silvery-gray, woolly, up to 2 1/2" long. Male catkins are golden yellow, to 2" long, females are grayish-yellow, to 3" long. A beautiful specimen by water, but don't plant this tree anywhere near a septic system or its lines or you and the Roto-Rooter man will know each other on a first name basis. Native to Northern Europe.