rush skeletonweed

Asterales > Asteraceae > Chondrilla juncea L.
Synonym(s): skeletonweed

Rush skeletonweed is a perennial forb that can grow up to 4 ft. (1.2 m) tall. Coarse-looking, multiple stems appear leafless due to inconspicuous leaves and arise from a basal rosette of sharply lobed leaves. The lower 4-6 in. (10.2-15.2 cm) of stem is covered with coarse brown hairs. Both stem and leaves produce a milky sap when broken. Flowers are small and yellow and develop in the mid-summer to fall. Mature, healthy plants can produce 1,500 flower heads and up to 20,000 seeds. Rush skeletonweed invades dry rangelands in the Western United States, displaces native species, and reduces forage for livestock and wildlife. Rush skeletonweed is native to regions of Europe, Asia, and Africa and was accidentally brought to the United States as a contaminant of fodder in 1914.


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); Rosette
Utah State University Archive, Utah State University, Bugwood.org
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Feature(s); Roots
Utah State University Archive, Utah State University, Bugwood.org
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Flower(s);
Richard Old, XID Services, Inc., Bugwood.org
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Flower(s);
Steve Dewey, Utah State University, Bugwood.org
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Flower(s);
Steve Dewey, Utah State University, Bugwood.org
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Plant(s); Rosette and old plant
Utah State University Archive, Utah State University, Bugwood.org
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Stem(s); The stiff down-turned hairs on the lower part of the stem are the diagnostic charicteristic.
Richard Old, XID Services, Inc., Bugwood.org
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Plant(s); in flower
Gary L. Piper, Washington State University, Bugwood.org
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Plant(s);
Utah State University Archive, Utah State University, Bugwood.org
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Infestation;
Utah State University Archive, Utah State University, 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: 314.
USDA PLANTS Database, USDA NRCS PLANTS Database, Bugwood.org
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Invasive Reference(s):

Check Invasive.org for most current lists.
  • Arizona - Noxious Weed Law
  • California - Noxious Weed Law
  • California - Invasive Plant Inventory
  • Colorado - Noxious Weed Law
  • Montana - Noxious Weed Law
  • Nevada - Noxious Weed Law
  • Oregon - Noxious Weed Law
  • South Dakota - Noxious Weed Law
  • Washington - Noxious Weed Law
  • Invasive Plants: Western North America


External Links


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