moss; short plants resembling moss (incl. other bryophytes, lichens, very small spermatophytes, etc.)
sphagnum; peat moss; bog moss
bryophyte (any of three groups of non-vascular land plants, incl. mosses, hornworts and liverworts)
mosses (non-vascular plants of class Bryopsida)
Climacium japonicum (species of moss)