Group: Spermatophytina (Spermatophytes)
Family: Potamogetonaceae (Pondweed family)
Genus: Zannichellia (Horned Pondweed)
Zannichellia palustris agg.
Zannichellia palustris L. - Horned Pondweed
Zannichellia pedunculata Rchb.