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Himalayan knotweed
Persicaria wallichii
Himalayan knotweed Smartweed-Buckwheat Family
Persicaria wallichii Polygonaceae
common name
  Himalayan knotweed
accepted scientific name
  Persicaria wallichii Greuter & Burdet
rules for finding collection records
  Persicaria wallichii (53)
  Polygonum polystachyum (56)
  Aconogonon polystachyum (0)
  Koenigia polystachya (0)
family name
Image Author: ©2005 Tony Rodd
Image License: CC BY-NC-SA
Image Source
Category: Wildflowers
Flowers: No obvious petals, Five petals
Petal colors: color
Leaf: Alternate
Plant Observed beginning of June thru 3rd week of October

How Likely at this Location (10%)
Name Match (100%)
Plant Showiness (36%)
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Native Plant Status
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native Not Native
native Not Present

Invasive in some regions.
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