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Polygonum majus
large knotweed Smartweed-Buckwheat Family
Polygonum majus Polygonaceae
--more--
common name
  large knotweed
accepted scientific name
  Polygonum majus (Meisn.) Piper
rules for finding collection records
  Polygonum douglasii majus (109)
  Polygonum majus (499)
family name
  Polygonaceae
Image Author: ©2006 Paul Slichter
Image License: Author's permission
Image Source
Category: Wildflowers
Flowers: Five petals
Petal colors: color color
Flower size is about 0.15 inches
Leaf: Alternate
Plant Observed beginning of May thru 2nd week of October

How Likely at this Location (22%)
Name Match (100%)
Plant Showiness (36%)
Links to Plant Photos
R.L.Carr (17)
Paul Slichter (5)
Cal Photos (6)
G.D.Carr (6)
Mt Rainier Photos (1)
base map where plant found
mag select

Disturbed
Rocky
Sand
Forest
Riparian
Grassland
Desert
Brush
grid lines base