The Sphagnopsida includes a single subclass Sphagnidae, with two orders. The order Sphagnales contains four living genera: Sphagnum, with all but three of the species, and Ambuchanania, Eosphagnum, and Flatbergium, each with a single species. The Protosphagnales contains a single fossil species.
Species taxanomy provided by GBIF Secretariat (2022). GBIF Backbone Taxonomy. Checklist dataset https://doi.org/10.15468/39omei accessed via GBIF.org on 2023-06-13; License: CC BY 4.0