| Azolla caroliniana 
 
 small free-floating aquatic fern from the eastern United States to tropical America;
 naturalized in western and southern Europe
 • Syn:
 mosquito fern, floating fern, Carolina pond fern
 • Hypernyms:
 aquatic fern, water fern
 • Member Holonyms:
 Azolla, genus Azolla
 
 
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