black henbane

Solanales > Solanaceae > Hyoscyamus niger L.
Synonym(s): henbane

Black henbane is an annual or biennial plant that can grow to 3 ft. (1 m) in height. The fetid smelling leaves are alternate, simple, toothed, up to 8 in. (20 cm) long and 6 in. (15 cm) wide. In the early season (annual), or first year of growth (biennial) the plant is represented by a rosette. Flowering occurs in spring to early fall. Flowers are cream to green, five-lobed, 2 in. (5 cm) wide and have purple throats. Seeds are small and black. Prolific seed production increases the spread of this plant, as a single plant can produce up to half a million seeds. Black henbane is native to the Mediterranean and is poisonous to most mammals. It has been used medicinally for hundreds of years.


Identification, Biology, Control and Management Resources


Selected Images from Invasive.org

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Seedling(s);
Jan Samanek, State Phytosanitary Administration, Bugwood.org
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Plant(s);
Jan Samanek, State Phytosanitary Administration, Bugwood.org
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Foliage;
Mary Ellen (Mel) Harte, , Bugwood.org
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Foliage;
Mary Ellen (Mel) Harte, , Bugwood.org
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Plant(s);
Steve Dewey, Utah State University, Bugwood.org
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Plant(s);
Mary Ellen (Mel) Harte, , Bugwood.org
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Plant(s);
Jan Samanek, State Phytosanitary Administration, Bugwood.org
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Plant(s); in flower
Jan Samanek, State Phytosanitary Administration, Bugwood.org
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Plant(s); in flower
Jan Samanek, State Phytosanitary Administration, Bugwood.org
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Flower(s);
Jan Samanek, State Phytosanitary Administration, Bugwood.org
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Flower(s);
Jan Samanek, State Phytosanitary Administration, Bugwood.org
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Feature(s); Flowers and seed capsules
Steve Dewey, Utah State University, Bugwood.org
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Seed(s);
Jan Samanek, State Phytosanitary Administration, Bugwood.org
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Seed(s);
Jan Samanek, State Phytosanitary Administration, Bugwood.org
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Seed(s);
Steve Hurst, USDA NRCS PLANTS Database, Bugwood.org
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Diagram or Graphic; Britton, N.L., and A. Brown. 1913. Illustrated flora of the northern states and Canada. Vol. 3: 169.
USDA PLANTS Database, USDA NRCS PLANTS Database, Bugwood.org
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Invasive Reference(s):

Check Invasive.org for most current lists.
  • California - Noxious Weed Law
  • Colorado - Noxious Weed Law
  • New Mexico - Noxious Weed Law
  • Nevada - Noxious Weed Law
  • Washington - Noxious Weed Law
  • Invasive Plants: Western North America
  • Invasive Plants: Guide to Identification and the Impacts and Control of Common North American Species


External Links


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