Show Lower Taxa
Fallopia japonica
Bot. J. Linn. Soc. 98: 369. 1988.
Common names: Japanese knotweed
Basionym: Reynoutria japonica Houttuyn Nat. Hist. 2: 640, plate 51, fig. 1. 1777
Revision as of 21:06, 24 September 2019 by FNA>Volume Importer
Distribution
Asia, introduced in Europe.
Discussion
Varieties 4 (1 in the flora).
Fallopia japonica is planted widely as a garden ornamental; it has a proclivity to escape and spread aggressively. Once established, plants can be difficult to eradicate because of their extensive, woody rhizomes. The species has been declared noxious in Alabama, California, Oregon, Vermont, and Washington.