Himalayan Knotweed
Persicaria wallichii |
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| Family Name: |
Polygonaceae |
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| Class: | B | |
| Other Names: | bell-shaped knotweed | |
| Why is it a noxious weed? | It grows vigorously into dense colonies that exclude native vegetation, alters natural ecosystems and is difficult to eradicate. It poses a significant threat to riparian areas, where it can survive severe floods. Small fragments can form new plants. | |
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More Information:
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Visit Washington State Noxious Weed Control Board Here
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