National Institute for Environmental Studies Invasive Species of Japan Japanese | English
  1. Invasive Species of Japan >
  2. Vascular plants >
  3. Gymnocoronis spilanthoides

Gymnocoronis spilanthoides

Basic information
Scientific name Gymnocoronis spilanthoides

Click to magnify

ミズヒマワリ
Common names Senegal tea plant, Giant green hygro
Higher taxon Asteraceae, Asterales, Magnoliopsida, Magnoliophyta
Natural range C & S America
Habitat Around channel, stream.
Invasion information
Range in Japan Tohigi, Gumma, Chiba, Saitama, Tokyo, Aichi, Shiga, Wakayama, Osaka, Hyogo, Kochi, Fukuoka, and Oita Prefs. Range in Japan
Origin Unknown.
Date The first record of establishment was in 1995 at Aichi Pref.
Route Deliberate: escaped from ornament in aquarium.
Impact Competition with native species. Disturbance of channel. Destruction of fish habitat. Eradication is conducted in channels of Tokyo, Osaka, and Fukuoka.
Affected organism: Native aquatic plants and animals.
Regulation in Japan Import, transport and keeping are prohibited in Japan.
Introduced range in other countries Taiwan, Australia, New Zealand, etc.
Reference Notes
  • DECO (ed) (2006) Dictionary of Alien Species. Tokyo-Shoseki. (in Jpn)
  • GBIF Portal http://data.gbif.org/welcome.htm
  • JWRC (ed) (2008) A Photographic Guide to the Invasive Alien Species in Japan. Heibonsha. (in Jpn)
  • etc.