Potamogeton perfoliatus

Systematics :

Kingdom: Plantae
Artificial group: Vascular plant (Tracheophytes)
Superphylum: Spermatophyte
Phylum: Magnoliophyta
Class: Liliopsida
Family: Potamogetonaceae
Genus: Potamogeton
Species: Potamogeton perfoliatus

Other names: hjartetjønnaks, hjertetjønnaks

Norwegian name: Hjertetjernaks