Plagiomnium is a genus of mosses in the family Mniaceae.[1] It was formerly a part of a more encompassing genus Mnium and in 1968 Finish bryologist Timo Juhani Koponen justified splitting the genus into a number of smaller genera.[2]
Plagiomnium are commonlyg found along shaded stream banks, seeps and springs, generally on soil with a high humus content.