common tansy

Asterales > Asteraceae > Tanacetum vulgare L.
Synonym(s): garden tansy, tansy

Common tansy is an aromatic, perennial herb native to Eurasia. Plants can reach to 5 ft. (1.5 m) in height and can be toxic to people and other animals if ingested in large quantities. Leaves are alternate, sessile or short-stalked, highly divided and glandular dotted. Flowering occurs from August to October, when yellow, button-like flowers develop in flat-topped clusters at the apex of the plant. Fruit are 5-angled achenes with small glands. Plants invade disturbed areas, ditch banks and riparian areas.


Identification, Biology, Control and Management Resources

  • Weeds of the Week - USDA Forest Service, Northeastern Area, Forest Health Protection

Selected Images from Invasive.org

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Plant(s);
Michael Shephard, USDA Forest Service, Bugwood.org
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Plant(s);
Steve Dewey, Utah State University, Bugwood.org
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Foliage;
Mary Ellen (Mel) Harte, , Bugwood.org
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Flower(s);
Steve Dewey, Utah State University, Bugwood.org
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Flower(s);
Michael Shephard, USDA Forest Service, Bugwood.org
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Plant(s); in flower
Steve Dewey, Utah State University, Bugwood.org
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Infestation;
Steve Dewey, Utah State University, Bugwood.org
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Infestation;
Michael Shephard, USDA Forest Service, Bugwood.org
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Plant(s); in front of a sunflower field
Jan Samanek, State Phytosanitary Administration, 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: 522.
USDA PLANTS Database, USDA NRCS PLANTS Database, Bugwood.org
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Invasive Reference(s):

Check Invasive.org for most current lists.
  • California - Invasive Plant Inventory
  • Colorado - Noxious Weed Law
  • Montana - Noxious Weed Law
  • Washington - Noxious Weed Law
  • Wyonming - Noxious Weed Law
  • Mid-Atlantic - EPPC List
  • Invasive Plants: Western North America
  • Invasive Plants of the Upper Midwest


External Links


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USDA Forest Service Bugwood University of Georgia