| Concept definition: |
A <PLANT> of the class Musci, comprising small bryophtes with scale-like leaves usually spirally arranged, with a spore-capsule usually opening by a lid, which grow in crowded masses in <BOG>s or on <SURFACE>s; or any of certain <ALGA>s, <LICHEN>s, <PTERIDOPHYTE>s, or flowering <PLANT>s resembling moss in habit; moss [SOED, "moss", II 3]. |
