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Noxious Weed!Rush Skeletonweed (Chondrilla juncea)
Sunflower Family   (Asteraceae )

 

Noxious Weed: Rush skeletonweed
University of Idaho

 
  
 

Description:  A many branched biennial or perennial, 1 to 4 feet, with milky sap. Lower 4 to 6 inches of stem have downward bent, coarse reddish hairs. Leaves form a basal rosette, sharply toothed, that wither as stems develop. Stem leaves inconspicuous, narrow and entire. Flowers scattered on branches, less than 1 inch across, with 7 to 15 yellow, strap-shaped petals with 5 distinct teeth at the end. Seeds pale brown to nearly black, about 1/8 inch long, several-ribbed, smooth below with tiny scaly projections above, terminated by numerous soft white bristles.

Habitat: Native to southern Europe. It generally grows in well-drained, light-textured soils along roadsides, rangelands, grain fields, pastures and vineyards. Easily invades disturbed sites. Extensive, deep root system make Rush Skeletonweed difficult to control.

Distribution: Rush Skeletonweed is found primarily in Sacramento. However, there have been plants found mostly along roadways in Plumas, Sierra, Tehama, and Shasta counties.

Flowering Period: July to September.

 


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