Black henbane is an annual or biennial plant that grows up to 3 feet tall. The stems and leaves are covered with greasy hairs. Shallow lobed leaves are up to 8 inches long and 6 inches wide.
Flowers are showy, 5 lobed, up to 2 inches across, black and white in color with distinct veins.
The calyx forms a 1-inch, urn-shaped “fruit” that has a thickened lid that pops off at maturity and spills the black seeds. Black henbane has very distinct skeletons with the urn shaped fruit filled with seeds still attached.