Rhodobryum roseum, commonly known as rose moss, is a species of moss of the subclass Bryidae and family Bryaceae, found throughout most of the world in woods or sheltered grassy places.

It rarely forms sporophytes and spore cases, and primarily reproduces vegetatively by stolons, horizontal stems that root at the nodes, resulting in populations of plants that are sterile or only female.

Extracts such as ursolic acid, flavonoids and alkaloids have been used in cardiac and other medical research.

Mosses show great diversity in morphology and anatomy of their gametophytes and sporophytes.

Because of their small sizes it is difficult differentiating between Rhodobryum roseum and its adulterants by traditional methods.