''Ceratophyllum demersum'' is a species of ''Ceratophyllum''. It is a submerged, free-floating aquatic plant, with a cosmopolitan distribution, native to all continents except Antarctica. It is a harmful introduced weed in New Zealand. It is also a popular aquarium plant.
Similar species: Ceratophyllales
By travismorhardt
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Uploaded Nov 12, 2013. Captured Jul 22, 2013 13:37 in Sweetwater Lake Loop, Saint Michael, ND 58370, USA.