The enormous marsh stretches out across tens of thousands of hectares, extending beyond the national park boundaries and forming a landscape with primordial characteristics. The moss has a great abundance of species.
Out on the high moss, three different species of carnivorous sundew flourish along with more than 20 species of bog moss. Crowberry, heather, hare's-tail cottongrass and mare-pines add character to the high moss. On the edges you will find sweet gale, marsh Labrador tea and cranberry.
Plants growing in the lime-rich Björnekullakärret fen include parnassia, cotton deergrass, narrow-leaved marsh orchid, marsh helleborine, fragrant orchis, butterwort and broad-leaved bog-cotton, which are typical species for lime-rich fens.