Stratiotes aloides

Sufeneri

Plant rooted only at seeding stage, submerged, but rising to float on water surface at anthesis. Leaves to 30 x 1.5 cm. Peduncles to 25 cm. Petals white, obovate-orbicular, 15-20 mm. Fl. 7-8. Sheltered lakes, nr s.l.

Europe , Siberia. Euro-Sib. element.