Species Factsheet

Fallopia japonica


Complete name: Fallopia japonica (Houtt.) Ronse Decraene var. japonica; Fallopia sachalinensis (F. Schmidt) Ronse Decraene; Fallopia x bohemica (Chrtek & Chrtková) J. P. Bailey
Taxonomy: Magnoliophyta » Magnoliophyta » Rosopsida » Caryophyllales » Polygonaceae » Fallopia japonica
Authors: Petr Pysek
Last updated: September 21th, 2006

Common Names

Japanese knotweed s.l.


Fallopia japonica (Houtt.) Ronse Decr.
Pleuropterus cuspidatus (S. et Z.) H. Gross
Polygonum cuspidatum Siebold & Zucc.
Polygonum reynoutria Makino
Polygonum sieboldii Reinw. ex de Vries
Polygonum zuccarinii Small
Reynoutria japonica Houtt.
Tiniaria cuspidata (Houtt.) Hedb.
Tiniaria japonica (Houtt.) Hedberg

Short Description

Herbaceous perennials with robust erect stems up to 4 m tall and extensive system of rhizomes, 15-20 m long, penetrating 2-3 m deep in soil. The invasive knotweeds in Europe include Fallopia japonica var. japonica, F. sachalinensis, and their hybrid, F. x bohemica.