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Senecio madagascariensis

Basic information
Scientific name Senecio madagascariensis

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ナルトサワギク
Common names Fireweed, Madagascar ragwort, Madagascar groundsel
Higher taxon Asteraceae, Asterales, Magnoliopsida, Magnoliophyta
Natural range E Africa
Habitat Waste land, roadside, vacancy, landfill, grass farm, etc.
Invasion information
Range in Japan Fukushima, Chiba, Shizuoka, Shiga, Mie, Nara, Osaka, Wakayama, Hyogo, Okayama, Kagawa, Tokushima, Kochi, Saga, and Fukuoka Prefs. Range in Japan
Origin USA
Date The first record in Japan was in 1976, at Naruto, Tokushima Pref.
Route Accidental: With imported other slope protection plant.
Impact Competition with native species. Allelopathy. Intoxication by alkaloid to herbaceous (including domestic) animals.
Affected organism: Native grasses and herbaceous animals.
Regulation in Japan Import, transport and keeping are prohibited in Japan by the Invasive Alien Species Act.
Introduced range in other countries N & S America, Hawaii, Australia, South Africa, Swaziland, etc.
Reference Notes
  • DECO (ed) (2006) Dictionary of Alien Species. Tokyo-Shoseki. (in Jpn)
  • GBIF Portal http://data.gbif.org/welcome.htm
  • Kinoshita et al. (1999) Senecio madagascariensis, a naturalized species in Japan. Acta Phytotax Geobot. 50(2), 243-246 (in Jpn)
  • JWRC (ed) (2008) A Photographic Guide to the Invasive Alien Species in Japan. Heibonsha. (in Jpn)
  • Shimizu (2003) Naturalized Plants of Japan. Heibonsha, Tokyo (in Jpn)