Types
Spirodela polyrrhiza
Greater duckweed -
Spirodela polyrrhiza
one common form of duckweed.
The arrows (above right) refer to the frond (center) and the root (at right).
Vegetative multiplication with the aid of the pocket.
Group of four fronds.
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Lemna minor
Lemna trisulca
Lemna gibba
Wolffia arrhiza
Êðàñíîäàð, 2002