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  3. Cyperus eragrostis

Cyperus eragrostis

Basic information
Scientific name Cyperus eragrostis (No picture)
Common names Tall flatsedge
Higher taxon Cyperaceae, Poales, Liliopsida, Magnoliophyta
Natural range Tropical America
Habitat This species prefer habitat with moist soil and sunshine. Farm area, riverside, swamp, vacancy, etc.
Invasion information
Range in Japan Kanto District and western region in main land of Japan, Okinawa, and Ogasawara (Bonin) Islands. Range in Japan
Origin Unknown
Date The first record in Japan was in 1959, at Mie Pref. The first record in Kanagawa Pref. was in 1980. Spread since late 1990s.
Route Unknown
Impact Potentially: Competition with native plants. In foreign countires, noxious weed in crop field of rice and soy beans. Disturbance of canals.
Affected organism: Native swamp plants, crops, etc.
Regulation in Japan No regulation in Japan.
Introduced range in other countries Tropical to warm-temperate zone in Asia, Australia, Europe, and North and South America.
Reference Notes
  • DECO (ed) (2006) Dictionary of Alien Species. Tokyo-Shoseki, Tokyo (in Jpn)
  • JWRC (ed) (2008) A Photographic Guide to the Invasive Alien Species in Japan. Heibonsha, Tokyo (in Jpn)
  • Osada (1976) Colored Illustrations of Naturalized Plants of Japan. Hoikusha, Osaka (in Jpn)
  • etc.