rush skeletonweed USDA PLANTS Symbol: CHJU
U.S. Nativity: Exotic
Habit: Forbs/Herbs
Chondrilla juncea L.

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Taxonomic Rank: Magnoliopsida: Asterales: Asteraceae
Synonym(s): skeletonweed
Native Range: Not Found (BAIL);

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

Selected Images from Invasive.orgView All Images at Invasive.org


Plant(s); in flower
Gary L. Piper, Washington State University, Bugwood.org
Additional Resolutions & Image Usage

Flower(s);
Steve Dewey, Utah State University, Bugwood.org
Additional Resolutions & Image Usage

Root(s); Roots
Utah State University Archive, Utah State University, Bugwood.org
Additional Resolutions & Image Usage

Plant(s); Rosette and old plant
Utah State University Archive, Utah State University, Bugwood.org
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Plant(s); Rosette
Utah State University Archive, Utah 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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Flower(s);
Steve Dewey, Utah State University, Bugwood.org
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Plant(s); 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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Seed(s);
Steve Hurst, USDA NRCS PLANTS Database, Bugwood.org
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EDDMapS Distribution:
This map is incomplete and is based only on current site and county level reports made by experts and records obtained from USDA Plants Database. For more information, visit www.eddmaps.org
 


State(s) Where Reported invasive.
Based on state level agency and organization lists of invasive plants from WeedUS database.

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U.S. National Parks where reported invasive:
Grand Canyon National Park (Arizona)



Invasive Listing Sources:
California Invasive Plant Council
Faith Campbell, 1998
Jil M. Swearingen, Survey of invasive plants occurring on National Park Service lands, 2000-2007
John Randall, The Nature Conservancy, Survey of TNC Preserves, 1995.
Pacific Northwest Exotic Pest Plant Council, 1998