Sparganium erectum (Branched Bur-reed)

Systematics :

Kingdom: Plantae
Artificial group: Vascular plant (Tracheophytes)
Superphylum: Spermatophyte
Phylum: Magnoliophyta
Class: Liliopsida
Family: Sparganiaceae
Genus: Sparganium
Species: Branched Bur-reed (Sparganium erectum)

Other names: kjempe-piggknopp

Norwegian name: Kjempepiggknopp