Species richness and distribution ranges of European Sphagnum
There are 51 Sphagnum species in Europe. Sphagnum species richness shows a gradient of decrease from the boreal region towards the north and the south, as well as from west to east to some degree. There is a strong correlation between number of species and number of range restricted species. The most species rich countries (Norway and Sweden) also have most range restricted species. Most species occur in boreal, oceanic and/or alpine areas. Several areas, primarily several countries on the Balkans and Slovakia are identified as probably underexplored for Sphagnum species.