Sphagnopsida is a class of

moss Mosses are small, non-vascular flowerless plants in the taxonomic division Bryophyta (, ) '' sensu stricto''. Bryophyta (''sensu lato'', Schimp. 1879) may also refer to the parent group bryophytes, which comprise liverworts, mosses, and hor ...

es that includes a single subclass Sphagnidae, with two orders. It is estimated it originated about 465 million years ago, along with Takakia.With Over 60 Independent Losses, Stomata Are Expendable in Mosses
/ref> The order

Sphagnales The Sphagnales is an order of mosses with four living genera: '' Ambuchanania'', '' Eosphagnum'', '' Flatbergium'', and ''Sphagnum ''Sphagnum'' is a genus of approximately 380 accepted species of mosses, commonly known as sphagnum moss, pea ...

contains four living genera: ''

Ambuchanania ''Ambuchanania leucobryoides'' is the only species in the monotypic genus ''Ambuchanania''. It is a ''Sphagnum''-like moss endemic to Tasmania. Originally described as a species of ''Sphagnum'', it is now a separate genus named after the origin ...

'', ''

Eosphagnum ''Eosphagnum inretortum'' is a species of moss, and the only species of the genus ''Eosphagnum''. Originally described as a species of ''Sphagnum ''Sphagnum'' is a genus of approximately 380 accepted species of mosses, commonly known as spha ...

'', and ''

Flatbergium ''Flatbergium'' is a genus of 2 accepted species. ''Flatbergium sericeum'' and ''Flatbergium novo-caledoniae'', originally described as species of ''Sphagnum'', are now considered part of a separate genus on the basis of genetic differences. The ...

'', which counts four species in total, and ''

Sphagnum ''Sphagnum'' is a genus of approximately 380 accepted species of mosses, commonly known as sphagnum moss, peat moss, also bog moss and quacker moss (although that term is also sometimes used for peat). Accumulations of ''Sphagnum'' can store wa ...

'' which contains the rest of the species. The extinct Protosphagnales contains a single fossil species.

References

* Shaw, A. Jonathan (2000)
"Phylogeny of the Sphagnopsida Based on Chloroplast and Nuclear DNA Sequences"
''The Bryologist''. 103 (2): 277–306. Plant classes {{Bryophyte-stub