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Rhytidiadelphus subpinnatus
The Scarce Turf Moss,Rhytidiadelphus subpinnatus, is a species of carpet-forming moss that has long brown and moist branches with pointy leaf-like structures growing off them. These green leaf-like structures are soft to touch. Very closely related to Rhytidiadelphus squarrosus, with which it is often confused. Rhytidiadelphus subpinnatus is significantly rare.

Distribution
Rhytidiadelphus subpinnatus Can be found in North America, northwest Europe, North Europe, and East Europe.

Habitat and Ecology
Rhytidiadelphus subpinnatus naturally grows in Damp to wet soil, humus, logs, and rocks in swamps and moist forests, often along streams and in spray of waterfalls. Moreover, R.subpinnatus like wet conifer and conifer-hardwood forests. It is a perennial plant

Morphology
Rhytidiadelphus subpinnatus, is soft moss, with a 2--4 mm wide measured across leafy stem, to 15 cm long. The steams are branched irregularly in a pinnate formation. These branches are commonly 20 mm. The stem is visible between leaves except at the tip, which is erect-spreading into a squarrose. “Rhytidiadelphus subpinnatus” reproduce via Mosses spores. These Spores are housed in the brown capsule that sits on the seta. However, for these spores to formulate the male antheridium must release swimming sperm that fertilizes the egg found in the archegonium. This fertilized egg turns into a developing zygote which grows into the elongated sporophyte. The mature sporophyte is comprised of the spore containing capsule and the seta.

Taxonomy
Although Rhytidiadelphus squarrosus and R. subpinnatus have sometimes been considered varieties of a single species, particularly by botanists from the United States, studies using microsatellites show them to be separate.