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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 (38)
  Polygonum polystachyum (52)
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
Noxious weed in OR.

How Likely at this Location (12%)
Name Match (100%)
Plant Showiness (36%)
Links to Plant Photos
Wikimedia Commons (13)
Carolinas & Georgia (8)
G.D.Carr (7)
Cal Photos (5)
Salicicola (14)
base map where plant found
mag select

grid lines base