Almost no work has been done on aquatic bryophytes in this country (Glime, 1968), and what has been done is primarily taxonomic, with a limited amount of ecological work in lakes. The present report is part of a study to determine some of the ecology and life habits of Fontinalis novae-angliae Sull. in a woodland stream in Plymouth, Grafton Co., N.H. The present paper will treat the effects of the heavy spring drift on these plants.