| NOUN | plant | great duckweed, water flaxseed, Spirodela polyrrhiza | cosmopolitan except South America and New Zealand and some oceanic islands |
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| Meaning | cosmopolitan except South America and New Zealand and some oceanic islands. | |
|---|---|---|
| Synonyms | water flaxseed, Spirodela polyrrhiza | |
| Member of | Spirodela, genus Spirodela | minute aquatic herbs floating on the water surface consisting of a shiny leaflike frond and 2-21 roots |
| Broader | duckweed | Any small or minute aquatic plant of the family Lemnaceae that float on or near the surface of shallow ponds |
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