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  3. Ageratina altissima

Ageratina altissima

Basic information
Scientific name Ageratina altissima (No picture)
Common names White Snakeroot
Higher taxon Asteraceae, Asterales, Magnoliopsida, Magnoliophyta
Natural range Temperate region in eastern North America.
Habitat Forest, grassland, urban area.
Invasion information
Range in Japan The first record of establishment (1916) was in Hakone, Kanagawa Pref. Current distribution is urban area in Hokkaido to Kinki District. Not so abundant. Range in Japan
Date Introduced in 1896. The first record of establishment was in 1916 at Hakone.
Route Deliberate: As ornamental.
Impact Potentially: Competiton with native species. In the USA, milk is contaminated with some harmful substance when cow eats this species.
Affected organism: Native plants in urban to forest area.
Regulation in Japan No action for prevention, mitigation, control, or eradication.
Introduced range in other countries South Korea.
Reference Notes
  • Niering & Olstead (1990) The Audubon Society Field Guide to North American Wildflowers, Eastern Region. Knopf. NY.
  • Osada (1976) Colored Illustrations of Naturalized Plants of Japan. Hoikusha, Tokyo (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)