Euryale ferox

''Euryale ferox'' , Onibas in Japanese or gorgon nut) is the only extant species in the genus ''Euryale''. It is a flowering plant classified in the water lily family, Nymphaeaceae, although it is occasionally regarded as a distinct family Euryalaceae. Unlike other water lilies, the pollen grains of ''Euryale'' have three nuclei.