Mosses belong to the division Bryophyta and are non-vascular plants that play a crucial role in the ecosystem. 

They are small, soft, and dense plants that grow in clumps or mats, typically in damp or shady locations. 

Mosses have simple leaves that are usually one cell layer thick, without veins or stomata. 

They have stems but no roots, and absorb water and nutrients through their leaves. 

Mosses are anchored by rhizoids, small thread-like structures that resemble roots. 

They reproduce via spores, similar to ferns and other cryptogams.

They reproduce via spores, similar to ferns and other cryptogams.

They are important in the ecosystem, helping in soil formation, retaining moisture, and providing habitat for small animals.

Mosses have various uses, including in medicine, as insulation, and in the floral industry. 

Examples of mosses include Sphagnum, Polytrichum, and Bryum.