Conyza sumatrensis

Basic information
Scientific name	Conyza sumatrensis	Click to magnify
Major synonym	Erigeron sumatrensis
Common names	Sumatran Fleabane, Tall Fleabane
Higher taxon	Asteraceae, Asterales, Magnoliopsida, Magnoliophyta
Natural range	South America.
Habitat	Farm area, vacancy, fruit garden pasture field, roadside, etc.

Invasion information
Range in Japan	Honshu, Shikoku, and Kyushu Is.
Origin	Unknown.
Date	The first record in Japan was in 1920, at Tokyo.
Route	Accidental: Details unknown.
Impact	Competition with native species. Allelopathy. This species seems excluding another alien species C. banariensis. Native organism(s) affected: Native grasses, etc.
Regulation in Japan	No action for prevention, mitigation, control, or eradication.
Introduced range in other countries	Africa, Asia, Oceania.

Reference

Notes

DECO (ed) (2006) Dictionary of Alien Species. Tokyo-Shoseki, Tokyo (in Jpn)
Ecol Soc Jpn (ed) (2002) Handbook of Alien Species in Japan. Chijinshokan, Tokyo (in Jpn)
Hotta et al. (1989) Useful Plants of the World. Heibonsha, Tokyo (in Jpn)
JWRC (ed) (2008) A Photographic Guide to the Invasive Alien Species in Japan. Heibonsha, Tokyo (in Jpn)
Ministry of the Environment, Japan. The Invasive Alien Species Act (Accessed on 2011-02-03) http://www.env.go.jp/en/nature/as.html (in Jpn)
Satake et al. (1981) Wild Flowers of Japan, Herbaceous Plants [III]. Heibonsha, Tokyo (in Jpn)
Shimizu (ed) (2003) Naturalized Plants of Japan. Heibonsha, Tokyo (in Jpn)
etc.

100 of the Japan’s Worst Invasive Alien Species