The mosses together with the Hepaticae or liverworts constitute the group of plants known as the Bryophytes. This group is distinguished from the Thallophytes, by the fact that they present two modes of reproduction, the sexual and the asexual, which occur in regular alternation. This gives rise to what is called alternation of generations. Most bryophytes also exhibit a very fair differentiation as between stem and leaf.
Proceedings of the Iowa Academy of Sciences
©1898 Iowa Academy of Science, Inc.
Savage, T. E.
"A Preliminary List of the Mosses of Iowa,"
Proceedings of the Iowa Academy of Science, 6(1), 154-164.
Available at: https://scholarworks.uni.edu/pias/vol6/iss1/24