Juncus articulatus
Systematics :
Kingdom: Plantae
Artificial group: Vascular plant (Tracheophytes)
Superphylum: Spermatophyte
Phylum: Magnoliophyta
Class: Liliopsida
Family: Juncaceae
Genus: Juncus
Species: Juncus articulatus
Norwegian name: Ryllsiv