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Distribution by County 6769 |
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Cultivated knotweed, Himalayan knotweed
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Polygonum polystachyum is a perennial herb that is not native to California.
Current name in JEPS: Persicaria wallichii
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Record Count by County
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Suggested Citation
Calflora:
Information on California plants for education, research and conservation,
with data contributed by
public and private institutions and individuals,
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