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Erigeron philadelphicus

Basic information
Scientific name Erigeron philadelphicus

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ハルジオン
Common names Philadelphia fleabane
Higher taxon Asteraceae, Asterales, Magnoliopsida, Magnoliophyta
Natural range North America.
Habitat Around rice field, pasture field, roadside, farm area, riverside bank, vacancy, etc.
Invasion information
Range in Japan Almost entire Japan Range in Japan
Origin Unknown.
Date 1920s.
Route Deliberate: As ornamental plant
Impact Competition with native species, crops, pasture, etc. Allelopathy. An allergen of hay fever.
Affected organism: Native grasses, crops, pasture, etc.
Regulation in Japan No action for prevention, mitigation, control, or eradication.
Introduced range in other countries East Asia.
Reference Notes
  • Ecol Soc Jpn (ed) (2002) Handbook of Alien Species in Japan. Chijinshokan, Tokyo (in Jpn)
  • Osada (1976) Colored Illustrations of Naturalized Plants of Japan. Hoikusha, Osaka (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