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Mihai Costea +, François J. Tardif +  and Harold R. Hinds† +
Linnaeus +
Common knotweed +
St. Pierre and Miquelon +, Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. (Nfld.) +, N.W.T. +, N.S. +, Ont. +, P.E.I. +, Que. +, Sask. +, Yukon +, Ala. +, Alaska +, Ariz. +, Ark. +, Calif. +, Colo. +, Conn. +, Del. +, D.C. +, Fla. +, Ga. +, Idaho +, Ill. +, Ind. +, Iowa +, Kans. +, La. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Mont. +, Nebr. +, Nev. +, N.H. +, N.J. +, N.Mex. +, N.Y. +, N.C. +, N.Dak. +, Okla. +, Oreg. +, Pa. +, R.I. +, S.C. +, S.Dak. +, Tenn. +, Tex. +, Utah +, Vt. +, Va. +, Wash. +, Wyo. +  and Eurasia. +
0-3500 m +
Fields, uncultivated areas, waste places, roadsides +
Flowering May–Oct. +
Weedy +, Introduced +  and Illustrated +
Polygonum aviculare var. eximium +, Polygonum aviculare subsp. heterophyllum +, Polygonum aviculare subsp. monspeliense +, Polygonum aviculare var. vegetum +, Polygonum heterophyllum +  and Polygonum monspeliense +
Polygonum aviculare subsp. aviculare +
Polygonum aviculare +
subspecies +