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Biological controls for RUSH SKELETON coming soon.




Project information coming soon.





Plant Images from: USDA, NRCS. 2008. The PLANTS Database (http://plants.usda.gov, 19 March 2008). National Plant Data Center, Baton Rouge, LA 70874-4490 USA.

RUSH SKELETONWEED-Chondrilla juncea L.


Asteraceae (Sunflower family)


Rush skeletonweed is a perennial, 1 to 4 feet tall.  Starting at the stem base for 4 to 6 inches, stems usually have downwardly bent coarse hairs; smooth stems above.  Leaves form in a basal rosette, sharply toothed, and wither as the flower stem develops.  Leaves of the stem are inconspicuous, narrow and entire.  Flowering heads are scattered on branches, approximately 3/4 inch in diameter, with 7 to 15 yellow, strap-shaped flowers.  Seeds are pale brown to nearly black, about 1/8 inch long.  Body of seed is several-ribbed, smooth below with tiny scaly projections above, terminated by a long beak with numerous soft white bristles.



Rush skeletonweed is an introduced Eurasian species which presently infests several million acres in Idaho, Oregon, Washington and California. It generally inhabits well-drained, light-textured soils along roadsides, in rangelands, grain fields and pastures.  Soil disturbance aids establishment.  The extensive and deep root system makes skeletonweed difficult to control.  Cut surfaces of the leaves and stems exude a milky latex. Flowering and seed production occur from mid-July through frost.     

(Courtesy of Weeds of the West)