Species: Krustjernaks (Potamogeton crispus)
Other names: krustjønnaks
Norwegian name: Krustjernaks
Norwegian Red List (2021): Near Threatened
Systematics :
| Kingdom | Planteriket (Plantae) | |||||||
| Artificial group | Vascular plant (Tracheophytes) | |||||||
| Superphylum | Frøplanter (Spermatophyte) | |||||||
| Phylum | Dekkfrøete blomsterplanter (Magnoliophyta) | |||||||
| Klasse | Enfrøblader (Liliopsida) | |||||||
| Family | Tjernaksfamilien (Potamogetonaceae) | |||||||
| Genus | Tjernaksslekta (Potamogeton) | |||||||
| Species | Krustjernaks (Potamogeton crispus) | |||||||
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