Peat Moss is partially decomposed material that forms when mosses and other living material decay in peat bogs. This type of moss forms over thousands of years. Most of what the U.S. uses grows in bogs in Canada.
Peat moss plants have a main stem with tight clusters of branch fascicles. These fascicles have two or three branches that spread out and three to four hanging braches. Clusters of young branches are found at the top of the plant. The stem is covered in random shaped stem leaves. These leaves contain two types of cells, including small, green, living chlorophyllose cells, and large, translucent, dead hyaline cells. Hyaline cells are highly capable of holding water.