Fallopia japonica

(Houttuyn) Ronse Decraene

Bot. J. Linn. Soc. 98: 369. 1988.

Common names: Japanese knotweed
WeedyIntroducedIllustrated
Basionym: Reynoutria japonica Houttuyn Nat. Hist. 2: 640, plate 51, fig. 1. 1777
Treatment appears in FNA Volume 5. Treatment on page 543. Mentioned on page 541, 542.

Distribution

V5 1110-distribution-map.gif

B.C., Man., N.B., N.S., Nfld. and Labr. (Nfld.), Ont., P.E.I., Que., Alaska, Ark., Calif., Colo., Conn., D.C., Del., Ga., Idaho, Ill., Ind., Iowa, Kans., Ky., La., Maine, Mass., Md., Mich., Minn., Miss., Mo., Mont., N.C., N.H., N.J., N.Y., Nebr., Ohio, Okla., Oreg., Pa., R.I., S.C., S.Dak., Tenn., Utah, Va., Vt., W.Va., Wash., Wis., 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.

... more about "Fallopia japonica"
Craig C. Freeman +  and Harold R. Hinds† +
(Houttuyn) Ronse Decraene +
Reynoutria japonica +
Japanese knotweed +
B.C. +, Man. +, N.B. +, N.S. +, Nfld. and Labr. (Nfld.) +, Ont. +, P.E.I. +, Que. +, Alaska +, Ark. +, Calif. +, Colo. +, Conn. +, D.C. +, Del. +, Ga. +, Idaho +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Maine +, Mass. +, Md. +, Mich. +, Minn. +, Miss. +, Mo. +, Mont. +, N.C. +, N.H. +, N.J. +, N.Y. +, Nebr. +, Ohio +, Okla. +, Oreg. +, Pa. +, R.I. +, S.C. +, S.Dak. +, Tenn. +, Utah +, Va. +, Vt. +, W.Va. +, Wash. +, Wis. +, Asia +  and introduced in Europe. +
Bot. J. Linn. Soc. +
beerling1994a +
Weedy +, Introduced +  and Illustrated +
Bilderdykia +
Fallopia japonica +
Fallopia +
species +