This introduced Eurasian species infests several million acres in Idaho, Oregon, Washington, and California and Montana. Soil disturbance aids in its establishment, particularly in well-drained, light textured soils along roadsides and rangelands.

Distinguishing Features One to four feet tall. Basal rosette is sharply toothed and withers as the flower stem develops. Stem leaves are narrow, inconspicuous. The first six inches of the stem base have downward-bent, coarse hairs; above that they are smooth, erect, stiff and bare in appearance.

If You Spot This Culprit, Report the location to a local land manager or park ranger. Avoid walking on, driving on, or camping in infested areas. Remove all weed seeds from your clothing, shoes, pets, camping gear, and tire treads before moving on.

We have reason to believe this criminal weed is hiding out in the surrounding area.

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Last Updated: January 25, 2005

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