Russian Knapweed
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Rhaponticum repens |
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| Family Name: |
Asteraceae |
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| Class: | B | |
| Other Names: |
hardheads, Turkestan thistle |
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| Why is it a noxious weed? |
It is an aggressive invader of pastures, non-crop areas, grain fields and other cultivated fields. In addition, the plant is poisonous to horses, causing chewing disease (equine nigropallidal encephalomalacia). Livestock may avoid this species. |
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More Information:
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Visit Washington State Noxious Weed Control Board Here
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