A Map of Duckweed Distribution
|Each dot indicates an area of duckweed occurrence.
Legend for numbers: The occurrence of
Lemnaceae lacking due to:
Duckweeds have been found on every continent, save Antarctica. Regions lacing duckweeds are indicated by numbers on the map (see legend). In particular, certain regions (Brazilian rain forest, Siberia) may not have been sufficiently explored by botanists.
Environmental Adaptation in Three Lemna Species
The extreme range of proliferation of the duckweeds as a group does not mean that are they are equally well-adapted to all conditions. Each genus and species of duckweed has a characteristic distribution.
Three species in the genus Lemna
are a good example:
Wolffiella is known only in America and Africa, but Spirodela,
Lemna and Wolffia are found world-wide. Spirodela
has its greatest diversity in South America, while Lemna is
most diverse in North America and Southeast Asia. Wolffia
occurs mainly in
America, Southeast Asia and Australia. Wolffiella is
(Landolt, 1986, page 233). For North American distribution maps
of many species [ link
]. The the area of greatest diversity for
given species is generally thought to represent the area where that
originated. See Duckweed
Read how duckweeds
survive harsh conditions: cold, drought and salinity stress.
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Revised: August 5, 2006