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Hypochaeris radicata

Basic information
Scientific name Hypochaeris radicata

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Common names Catsear, Flatweed, Spotted catsear
Higher taxon Asteraceae, Asterales, Magnoliopsida, Magnoliophyta
Natural range Europe.
Habitat Pasture field, farm area, lawn field, vacancy, roadside, etc.
Invasion information
Range in Japan Almost entire Japan Range in Japan
Origin Unknown.
Date The first record was in 1933 at Sapporo, Hokkaido. Recorded in 1934 at Kobe, Hyogo Pref. Spread since 1940s.
Route Accidental: With cattle food grain.
Impact Potentially: Competition with native species, crops, pasture, etc. Parasite (insects, viruses)
Affected organism: Native grasses, crops, pasture, etc.
Regulation in Japan No action for prevention, mitigation, control, or eradication.
Introduced range in other countries North and South America, Asia, Africa, Oceania.
Reference Notes
  • 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.