Knotweeds | Polygonum cuspidatum, Polygonum x bohemicum, Polygonum sachalinense

Photo Credit: Jan Samanek

Photo Credit: Nanna Borcherdt

Photo Credit: Chris Evans

Photo Credit: Steve Manning

Photo Credit: Randy Westbrooks





Perennial; small, white to green flowers in drooping clusters from leaf axils. Reddish brown and hollow stems. Leaves broad and ovate.
Plant Details
Habitat Notes | Near water sources, along streams and rivers, wetlands, riparian areas and roadsides. |
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Mature Height | 6.5-13’ |