Burdock is the name of several species of coarse, hairy weeds. Burdocks are also called beggar’s-buttons and clotburs. They have large, heart-shaped leaves. The roots live for two seasons. The stalks grow from 4 to 9 feet (1.2 to 2.7 meters) high during the second season. Burdocks are troublesome in the United States and Canada. Their seed heads stick to the hair of cattle and sheep. Burdocks can be destroyed by cutting off the flowers before seeds form.
