Black Henbane

Common Name: Black Henbane Scientific Name: Hyoscyamus niger Habitat: disturbed areas, roadsides, ornamental beds, grassland Provincial Designation: Noxious Noxious weeds are plant species that are designated as "noxious weeds" in the Alberta weed regulation. Noxious weeds must be controlled, meaning their growth or spread needs to be prevented.

Origin

Black henbane was introduced to North America from the Mediterranean and has been used as a medicinal plant since the Middle Ages. It was also used in ancient religious rites because of its hallucinogenic properties.

Legislated Because

All parts of the plant contain several toxic alkaloids that are poisonous to humans and animals when ingested. Black henbane is a prolific seed producer; a single plant can produce as much as half a million seeds in one season.

Description

The flowers of black henbane are very unique. They have united petals with 5 lobes. They are yellow with deep purple veins and throats and have a strong, unpleasant smell.

The leaves are alternately arranged along the stem and are shallowly lobed with a wavy smooth edge.

The entire plant is covered in sticky hairs. The fruit is typically urn-shaped with a crown-like edge. The stems are erect and grow up to 1 m tall.

Learn more about this species:

SeeFact Sheets - Alberta Invasive Species Council