What is Japanese knotweed?
[[File:Japanese_Knotweed_(Fallopia_japonica)_(22310124056).jpg|thumb|A picture of Japanese Knotweed]] '''Japanese knotweed''' (''Persicaria japonica'') is a perennial herbaceous plant. It lives in Asian countries including Taiwan, Japan and southern China.<ref>{{cite journal|url=http://phytogeogratax.main.jp/site/wp-content/uploads/2017/05/JPT51_1_59.pdf|journal=Journal of Phytogeography and Taxonomy|volume=51|pages=59–61|year=2003|author1=Yoshikane Iwatsubo|author2=Tomohiro Suzuki|author3=Naohiro Naruhashi|title=Polyploidy of Persicaria japonica (Polygonaceae) in Toyama Prefecture, central Japan|access-date=2019-07-22|archive-date=2019-07-22|archive-url=https://web.archive.org/web/20190722002931/http://phytogeogratax.main.jp/site/wp-content/uploads/2017/05/JPT51_1_59.pdf|url-status=dead}}</ref><ref>{{cite web|url=http://www.tropicos.org/Name/50132254?projectid=8|title=Persicaria japonica (Meisn.) H. Gross ex Nakai|publisher=Flora of China}}</ref> ==References== {{reflist}} {{biology-stub}} [[Category:Plants of Asia]] [[Category:Polygonaceae]]