Pleurozium

Pleurozium is a genus of pleurocarpous mosses belonging to the family Hypnaceae. The single species currently recognized in this genus is Pleurozium schreberi, commonly known as Schreber's big red stem moss or just red-stemmed feather moss. This moss is widely distributed in the Northern Hemisphere, found in boreal and temperate forests, as well as peatlands.

Distinguishing features of Pleurozium schreberi include its creeping, pinnately branched stems that form dense, often extensive mats. The stems are typically reddish-brown, especially towards the base, which gives rise to its common name. The leaves are ovate to ovate-lanceolate, gradually tapering to a point, and have a prominent costa that extends to about two-thirds the length of the leaf. The leaf margins are serrated. Sporophytes are rarely observed.

Pleurozium schreberi is an important component of the ground cover in many forest ecosystems. It plays a role in moisture retention, soil stabilization, and provides habitat for small invertebrates. Its tolerance to shade and acidic conditions allows it to thrive in diverse forest types, from coniferous forests to birch and aspen woods. It is often found growing on soil, decaying wood, and rocks. Due to its distinctive appearance and widespread distribution, it is a readily identifiable moss species for many field botanists and naturalists.