Schoenoplectus lacustris

Systematics :

Kingdom: Plantae
Artificial group: Vascular plant (Tracheophytes)
Superphylum: Spermatophyte
Phylum: Magnoliophyta
Class: Liliopsida
Family: Cyperaceae
Genus: Schoenoplectus
Species: Schoenoplectus lacustris

Norwegian name: Sjøsivaks