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  3. Rumex obtusifolius

Rumex obtusifolius

Basic information
Scientific name Rumex obtusifolius

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エゾノギシギシ
Common names Broadleaf dock, Bitter dock
Higher taxon Polygonaceae, Polygonales, Magnoliopsida, Magnoliophyta
Natural range Europe.
Habitat Various grassland, farm area, roadside, riverside, vacancy, etc.
Invasion information
Range in Japan Most of entire Japan Range in Japan
Origin Unknown.
Date The first record was in 1909 at Hokkaido. This species is postulated to be introduced in late 19C.
Route Accidental: Details unknown
Impact Potentially: Competition with native species, crops, etc.
Affected organism: Native plants, feed crops, fruit trees, etc.
Regulation in Japan No action for prevention, mitigation, control, or eradication.
Introduced range in other countries Asia, N Africa, Oceania, N and S America.
Reference Notes
  • Osada (1976) Colored Illustrations of Naturalized Plants of Japan. Hoikusha, Osaka (in Jpn)
  • Shimizu (2003) Naturalized Plants of Japan. Heibonsha, Tokyo (in Jpn)
  • etc.
A native beetle Gastrophysa atrocyanea specifically feed on this plants.
Plants of the genus Rumex frequently hybridize each other and have hybrid vigor.