Invasive Species Council of British Columbia
Invasive Plant

Black henbane

Hyoscynamus niger
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Black henbane contains toxins harmful to humans and animals if ingested

About This Species

Black henbane, native to the Mediterranean region, was introduced to North America as an ornamental and medicinal plant. It’s a resilient species that can thrive in various environments and be found in disturbed sites, rangelands, croplands, roadsides, and riparian areas.

Why does black henbane spread so easily? Just one plant can produce an astounding 10,000 to 500,000 seeds! These seeds can spread quickly and far. It also produces dense stands that crowd out native vegetation and reduce forage for livestock and wildlife.

Black henbane produces a foul odour and contains toxins harmful to humans and animals if ingested.

How to Identify

Black henbane can be an annual or biennial, growing up to one metre tall. The stems are upright, thick, and almost woody.
The flowers are funnel-shaped with five lobes and brownish-yellow with dark purple veins.
The leaves are large, up to 20 cm long and 15 cm wide, with shallowly lobed edges. They grow in an alternate pattern and are covered in fine, sticky hairs.

Take Action

Prevention is the best approach.

If you need advice about invasive species on your property or you are concerned about reported invasives in your local area, contact your local government or regional invasive species organization.

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