It has been known for a long time that tearing or cutting mosses has a growth-stimulating effect upon them. Dr. Margaret Fulford called my attention to the fact that it is an old practice of gardeners to chop up patches of moss in order to get a better growth of them. Growth obtained by cutting or tearing mosses consists of rhizoids, protonemata and leafy shoots. Whether one or more of these structures is obtained depends upon the species, the part of the plant cut and the conditions under which the cuttings are maintained. When the stem of a leafy gametophore is cut into pieces, the new growth consists mainly of leafy shoots which sprout from the axils of the leaves. If the piece is long enough to contain two or more axils there is a possibility of obtaining two or more shoots. One very rarely sees two shoots growing from the same axil.