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Washington State Weeds

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Italian Thistle

Italian Thistle

Carduus pycnocephalus
Family Name:

Araceae
Class: A
Other Names: Plymouth thistle, shore thistle 
 Why is it a noxious weed? Italian thistle invades pastures and rangeland. It crowds out more desirable forage, as well as native plants, and excludes livestock grazing where infestations are dense.

More Information:

 

 

 

 Visit Washington State Noxious Weed Control Board Here