Hypochaeris radicata

Basic information
Scientific name	Hypochaeris radicata	Click to magnify
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
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) Native organism(s) affected: 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.