Moss among three divisions: Bryophyta, Marchantiophyta and Anthocerotophyta. The current circumscription of Bryophyta includes only the mosses. The mosses, now division Bryophyta (Bryophyta sensu stricto), are divided into eight classes: Six of the eight classes contain only one or two genera each. Polytrichopsida includes 23 genera, and Bryopsida includes the majority of moss diversity with over 95% of moss species belonging to this class. The Sphagnopsida, the peat-mosses, comprise the two living genera "Ambuchanania" and "Sphagnum", as well as fossil taxa. However, the genus "Sphagnum" is a diverse, widespread, and economically important one. These large mosses form extensive acidic bogs in
Sphagnum fuscum a short stalk of around 1-2mm, with a brown capsule of about 1-1.5mm. "Sphagnum fuscum" prefers older, drier bogs to inhabit and will formulate hummocks in such conditions. In bogs dominated by black spruce, "S. fuscum" will form extensive ground cover. On average, "S. fuscum" inhabits more acidic soils with pH ranging from 3.6-7.5, and is also able to colonize at high elevations. The moss is circumpolar. "Sphagnum fuscum" faces endangerment across much of the globe. Due to reductions in wetlands and development of these areas, the moss is referred to as “high risk” in Germany, while being on several