National Institute for Environmental Studies Invasive Species of Japan Japanese | English
  1. Invasive Species of Japan >
  2. Vascular plants >
  3. Wolffia globosa

Wolffia globosa

Basic information
Scientific name Wolffia globosa (No picture)
Major synonym Wolffia arrhiza
Common names Rootless duckweed
Higher taxon Araceae, Alismatales, Liliopsida, Magnoliophyta
Natural range S Europe.
Habitat Lake or pond, rice field.
Invasion information
Range in Japan Kanto and Hokuriku District to western Japan Range in Japan
Origin Unknown.
Date Late 19C or early 20C
Route Accidental: with unknown vector
Impact Competition with native plants and rice. Host for insects and fungi.
Native organism(s) affected: Native aquatic plants, rice, etc.
Regulation in Japan No action for prevention, mitigation, control, or eradication.
Introduced range in other countries C-S Europe, Africa, Tropical Asia, Oceania, South and Latin America
Reference Notes
  • Osada (1976) Colored Illustrations of Naturalized Plants of Japan. Hoikusha, Tokyo (in Jpn)
  • Satake et al. (1982) Wild Flowers of Japan, Herbaceous Plants [II]. Heibonsha, Tokyo (in Jpn)
  • Shimizu (ed) (2003) Naturalized Plants of Japan. Heibonsha, Tokyo (in Jpn)
  • etc.