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Erigeron annuus

Basic information
Scientific name Erigeron annuus

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ヒメジョオン
Common names Annual fleabane, Sweet scabious
Higher taxon Asteraceae, Asterales, Magnoliopsida, Magnoliophyta
Natural range North America.
Habitat Farm area, fruit garden, pasture field, roadside, vacancy, grassland, etc.
Invasion information
Range in Japan Almost entire Japan Range in Japan
Origin Unknown.
Date ca. 1865
Route Deliberate: As ornamental plant
Impact Actually: Competition with native plants, crops, pasture, etc. Allelopathy, Parasite (insects, fungi, nematodes, viruses)
Affected organism: Native grasses (Mt. Kiraigamine, Yatsugatake, Oze, Senjogahara, etc.), crops, pasture, etc.
Regulation in Japan No action for prevention, mitigation, control, or eradication.
Introduced range in other countries Europe, Asia
Reference Notes
  • Jpn Assoc Advanc Phyto-Regul & Inst Contr Agrochem, Minist Agr, China (2000) Chinese Colored Weed Illustrated Book. Zenkoku-Noson-Kyoiku-Kyokai, Tokyo
  • 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)
100 of the Japan’s Worst Invasive Alien Species