Habitat

Duckweed is a fairly cosmopolitan plant found worldwide. Its habitat is normally listed as mesotrophic to eutrophic, quiet waters in suboceanic, cool, temperate regions with relatively mild winters.

Each dot indicates an area of duckweed occurrence.

Legend for numbers:  The occurrence of Lemnaceae lacking due to:
1 = too dry,  2 = too wet,  3 = too cold,  5 = not sufficiently explored