Pictorial guide to the flora of the British Isles

Reynoutria japonica Houtt.

Japanese knotweed (Polygonaceae)

SpreadBias within British IslesDirection of bias
Very widespreadNegligible tendencyS

Synonyms | Fallopia japonica (Houtt.) Ronse Decr. | Polygonum cuspidatum Sieb. & Zucc.

All images copyright © Christopher J. Dixon unless otherwise indicated.

L-R: Bidens tripartita, Melilotus officinalis, Mimulus guttatus, Thalictrum flavum, Ranunculus peltatus, Anchusa arvensis, Malva alcea, Lolium perenne