Species

Potamogeton perfoliatus L.

Common names:

kaelus-penikeel

Skaujošā glīvene Latvian,

kaelus-penikeel Estonian,

hjertetjernaks Norwegian Bokmål,

hjertetjønnaks Norwegian Bokmål,

hjartetjørnaks Norwegian Nynorsk,

hjartetjønnaks Norwegian Nynorsk,

hjartetjernaks Norwegian Nynorsk