Along with these similarities, are also many differences in constitution and make-up. The Class Sphagnopsida consists of Sphagnum, also called Peat Moss. Sphagnum forms extensive bogs that are very acidic. This acidity excludes many organisms from living there. Due to this acidity, bacteria and fungi are inhibited so that the decomposition of materials is very slow.
Organisms can stay preserved for hundreds of years.
This is evident with scientists finding bodies, with clothes still intact in Denmark approximately 2,000 years old. Sphagnum is limited to the northern hemisphere. There are approximately 350 species of Sphagnum . The stem of the gametophyte of Sphagnum bear clusters of branches, generally five at the node, which are more dense at the apex of the stem. Therefore, they form a mop-like head.