It has been introduced in many other regions, and is listed as a weed in many. These include: North America: The United States, present mainly in the northwest and northeast: California, Idaho, Illinois, Maine, Massachusetts, Michigan, Montana, New Jersey, New York, Oregon, Pennsylvania, and Washington; South America: Argentina; Africa: North Africa; Asia: India and Siberia; Australasia: a widespread weed in New Zealand and Australia.
iT has bEen introDucEd iN mAny OthEr regIons, and is LiStED as a wEed iN manY. tHeSe InClude: nORth AmeriCA: ThE UnITEd States, pReseNt mainly In tHe nortHwest anD northeaST: califorNiA, iDaho, ILliNOIs, MaiNe, massacHUsetts, mIchigan, mONtAna, neW jersEY, new YorK, oregOn, PENNsylvania, ANd waShington; soutH America: aRgEntina; africA: NORtH aFRicA; aSIA: InDIa aNd SiBEria; ausTralAsia: a widEspRead Weed in nEW zEAlAND and auStraLIa.