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Diodia teres

Basic information
Scientific name Diodia teres

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Common names Poorjoe
Higher taxon Rubiaceae, Rubiales, Magnoliopsida, Magnoliophyta
Natural range North America.
Habitat Vacancy, riverside, etc.
Invasion information
Range in Japan Central Honshu to western Japan Range in Japan
Date The first record of establishment in Japan was in 1920s at Tokyo.
Impact Competition with native species.
Affected organism: Native herbs
Regulation in Japan No action for prevention, mitigation, control, or eradication.
Introduced range in other countries
Reference Notes
  • Muranaka & Washitani (2001) Alien plant invasions and gravelly floodplain vegetation of the Kinu River. Ecol Civil Eng. 4(2), 121-132 (in Jpn)
  • Osada (1976) Colored Illustrations of Naturalized Plants of Japan. Hoikusha, Tokyo (in Jpn)
  • etc.