Invasion information |
Range in Japan |
Almost entire Japan. All the Prefectures of Honshu Is. except Akita, Yamagata and Ishikawa, and Tokushima, Ehime, Oita and Saga Prefs. |
|
Origin |
Unknown. |
Date |
Unknown. The oldest record in Japan was in 1867 at Kanagawa Pref. |
Route |
Unknown. |
Impact |
Competition and hybridization with native species. Native organism(s) affected: Native congener V. undulata. In W Japan, the native species have been replaced by the hybrid V. × myriantha. |
Regulation in Japan |
Import, transport and keeping are prohibited in Japan by the Invasive Alien Species Act. |
Introduced range in other countries |
North and South America, Africa, and Australia |