Although some species have conducting tissues, these are generally poorly developed and structurally different from similar tissue found in vascular plants. The individual plants are usually composed of simple leaves that are generally only one cell thick, attached to a stem that may be branched or unbranched and has only a limited role in conducting water and nutrients. Mosses typically form dense green clumps or mats, often in damp or shady locations. 1879 ) may also refer to the parent group bryophytes, which comprise liverworts, mosses, and hornworts. Mosses are small, non-vascular flowerless plants in the taxonomic division Bryophyta ( / b r aɪ ˈ ɒ f ə t ə/, / ˌ b r aɪ.
Clumps of moss on the ground and base of trees in the Allegheny National Forest, Pennsylvania, United States
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