Isoëtes lacustris

Systematics :

Kingdom: Plantae
Artificial group: Vascular plant (Tracheophytes)
Phylum: Pteridophyta
Class: Lycopsida
Family: Isoëtaceae
Genus: Isoëtes
Species: Isoëtes lacustris

Norwegian name: Stivt brasmegras

Confusion species: Isoëtes echinospora