Reynoutria japonica Houtt.

Medicinal parts:Bark

Native to:Amur, China North-Central, China South-Central, China Southeast, Hainan, Japan, Khabarovsk, Korea, Kuril Is., Manchuria, Nansei-shoto, Primorye, Sakhalin, Taiwan

Introduced into:Alabama, Alaska, Arkansas, Austria, Baltic States, Belgium, British Columbia, Bulgaria, California, Central European Rus, Colorado, Connecticut, Czechoslovakia, Delaware, Denmark, District of Columbia, Finland, Florida, France, Georgia, Germany, Great Britain, Hungary, Idaho, Illinois, Indiana, Iowa, Ireland, Italy, Kansas, Kentucky, Louisiana, Maine, Manitoba, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Netherlands, New Brunswick, New Hampshire, New Jersey, New York, New Zealand North, New Zealand South, Newfoundland, North Carolina, Norway, Nova Scotia, Ohio, Oklahoma, Ontario, Oregon, Pennsylvania, Poland, Portugal, Prince Edward I., Québec, Rhode I., Romania, South Carolina, South Dakota, Spain, Sweden, Switzerland, Tasmania, Tennessee, Transcaucasus, Ukraine, Utah, Vermont, Vietnam, Virginia, Washington, West Virginia, Wisconsin, Yugoslavia

Homotypic Synonyms:

Fallopia japonica (Houtt.) Ronse Decr. ;Polygonum japonicum (Houtt.) S.L.Welsh;Polygonum reynoutria Makino ;Tiniaria japonica (Houtt.) Hedberg 

Original plants and herbarium: