Wolffia Horkel ex Schleiden. Watermeal, Mud-mary, Rootless-duckweed.
A genus of 11 species, cosmopolitan. Infrageneric classification follows Les et al. (2022).
Ref: Landolt (1980); Landolt (1986); Landolt (2000) In Flora of North America Editorial Committee (2000); Landolt In Kubitzki (1998b); Les et al. (2002); Spaulding et al. (2019). Show full citations.
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