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Egeria densa

Basic information
Scientific name Egeria densa

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オオカナダモ
Common names Brazilian elodea, Egeria, Anacharis
Higher taxon Hydrocharitaceae, Alismatales, Liliopsida, Magnoliophyta
Natural range Argentine
Habitat Lake or pond, stream.
Invasion information
Range in Japan Honshu, Shikoku, and Kyushu of the Japanese main islands. Hachijojima Island (Izu Islands) Range in Japan
Origin Unknown.
Date 1910s. Established since 1940s.
Route Deliberate: as ornamental plant, experimental material for physiology.
Impact Competition with native species. Inhibition of boats. etc.
Native organism(s) affected: Native submerged plants (e.g., Hydrilla verticillata)
Regulation in Japan Keeping of this species in Saga Pref. are controled by a prefectural ordinance.
Introduced range in other countries East Asia, Northeast Asia, North Asia, Southeast Asia, Central Asia, Himalaya, South Asia, West Asia, Europe, Africa, Oceania, North America.
Reference Notes
  • Ecol Soc Jpn (ed) (2002) Handbook of Alien Species in Japan. Chijinshokan, Tokyo (in Jpn)
  • Hotta et al. (1989) Useful Plants of the World. Heibonsha, Tokyo (in Jpn)
  • 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, Tokyo (in Jpn)
  • Satake et al. (1982) Wild Flowers of Japan, Herbaceous Plants [I]. Heibonsha, Tokyo (in Jpn)
  • Shimizu (ed) (2003) Naturalized Plants of Japan. Heibonsha, Tokyo (in Jpn)
  • etc.
 100 of the Japan’s Worst Invasive Alien Species