Sparganium sp.
Systematics :
Kingdom: Plantae
Artificial group: Vascular plant (Tracheophytes)
Superphylum: Spermatophyte
Phylum: Magnoliophyta
Class: Liliopsida
Family: Sparganiaceae
Genus: Sparganium
Species (sp.): Sparganium sp.
Norwegian name: Piggknopp