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|Noun||1.||Lemnaceae - family of small free-floating thalloid plants|
liliopsid family, monocot family - family of flowering plants having a single cotyledon (embryonic leaf) in the seed
duckweed - any small or minute aquatic plant of the family Lemnaceae that float on or near the surface of shallow ponds
genus Lemna, Lemna - minute aquatic herbs floating on or below the water surface of still water consisting of a leaflike frond or plant body and single root
genus Spirodela, Spirodela - minute aquatic herbs floating on the water surface consisting of a shiny leaflike frond and 2-21 roots
genus Wolffia, Wolffia - minute rootless aquatic herbs having globular fronds floating on or near the water surface and bearing one flower per frond
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