lesser burrdock

Asterales > Asteraceae > Arctium minus Bernh.
Synonym(s): bardane, beggar's button, burdock, common burdock, small burdock, smaller burdock, wild burdock, wild rhubarb

Lesser burdock is a tall (up to 6 ft. [1.8 m]), biennial forb that occurs throughout the United States. First year plants form large rosettes. A stout flowering stalk is formed in the second year. Stem leaves are large, heart-shaped and very hairy on the undersides. Basal leaves are dark green, heart-shaped and up to 1 ft. (0.3 m) long. Flowering occurs in July to October, when pink to purple flowers develop. Flowers are enclosed in a prickly bur. Lesser burdock can become a problematic invader of pastures, hay fields and open prairie ecosystems. It acts as a secondary host for pathogens, such as powdery mildew and root rot, which affect economically important plants. Lesser burdock is native to Europe and came to the United States via accidental introduction.


Identification, Biology, Control and Management Resources

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

Selected Images from Invasive.org

Click on each thumbnail to download the image at 1536x1024 resolution or below for available resolutions.
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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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Foliage;
Mary Ellen (Mel) Harte, , Bugwood.org
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Plant(s);
Mary Ellen (Mel) Harte, , Bugwood.org
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Flower(s);
Mary Ellen (Mel) Harte, , Bugwood.org
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Flower(s);
John D. Byrd, Mississippi State University, Bugwood.org
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Fruit(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: 548.
USDA PLANTS Database, USDA NRCS PLANTS Database, Bugwood.org
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Invasive Reference(s):

Check Invasive.org for most current lists.
  • Colorado - Noxious Weed Law
  • Kentucky - EPPC List
  • Wyonming - Noxious Weed Law
  • Mid-Atlantic - EPPC List
  • Invasive Plants: Guide to Identification and the Impacts and Control of Common North American Species
  • Invasive Plants of the Upper Midwest


External Links


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USDA Forest Service Bugwood University of Georgia