出典:Wiktionary
出典:Wikipedia
出典:『Wikipedia』 (2011/06/30 12:01 UTC 版)
Japanese Knotweed (Fallopia japonica, syn. Polygonum cuspidatum, Reynoutria japonica) is a large, herbaceous perennial plant, native to eastern Asia in Japan, China and Korea. In North America and Europe the species is very successful and has been classified as an invasive species in several countries.