A Checklist of the Vascular Plants of Washington State
Hosted by the University of Washington Herbarium, Burke Museum
Hosted by the University of Washington Herbarium, Burke Museum
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Polygonaceae » Fallopia japonica
Last updated 5/13/2020 by David Giblin.
Fallopia japonica (Houtt.) Ronse Decr.[FNA5, HC2]
itadori knotweed
Publication: Bot. J. Linn. Soc. 98: 369. 1988.
Origin: Introduced from eastern Asia
selected vouchers: WTU
Notes: An aggressive weed in lowland Washington, especially in riparian corridors.
References: (none)
Infraspecies:
Synonyms & Misapplied Names:
Polygonum cuspidatum Siebold & Zucc.[HC]
Polygonum cuspidatum Siebold & Zucc. var. compactum (Hook. f.) L.H. Bailey
Reynoutria japonica Houtt.
