Black Henbane (Hyoscyamus niger L.), also referred to as common henbane, hogbean, hogbane, or insane root, is a member of the Solanaceae or nightshade family. Black henbane is an annual or biennial plant that can range in height from 1 to 3 feet tall. Rosette leaves are alternate and have petioles almost as long as the leaf blades. Stems of a mature plant are erect, leafy, thick, coarse, and widely branched.