Abeliophyllum, also miseonnamu, Korean abeliophyllum, white forsythia, or Korean abelialeaf) is a monotypic genus of flowering plants in the olive family, Oleaceae. It consists of one species, Abeliophyllum distichum Nakai, endemic to Korea, where it is endangered in the wild, occurring at only seven sites. It is related to "Forsythia", but differs in having white, not yellow, flowers.
Abeliophyllum distichum Nakai is not found outside Korea
We can't be sure it didn't affect somewhere else.