Ceratophyllum echinatum
PlantsFamily: Ceratophyllaceae · Genus: Ceratophyllum

Robert Curtis, Summit Metro Parks, iNaturalist observer · cc_by
About
Ceratophyllum echinatum, known as prickly coontail or spiny coontail, is an aquatic, perennial plant found in North America. Its name comes from fruits, which have a warty surface and long spines. Spiny coontail can be found in ponds and lakes, principally in eastern North America. It is the only species of its genus endemic to North America.
Summary from Wikipedia
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Growing details and traits for Ceratophyllum echinatum in the Library.
No cultivars in the Library yet — the full profile above covers the species itself.