Ecological Guide to the Mosses and Common Liverworts of the Northeast is an essential introduction to identifying mosses and common liverworts found in the northeastern United States and Canada. This richly illustrated guide, organized by substrate, offers readers with little prior experience or knowledge an intuitive, easy-to-use method for distinguishing over 250 species of bryophytes in the field. Sue Alix Williams teaches us how to narrow down species possibilities at a site by first paying attention to the particular substrate, such as a tree trunk or a river rock. Field and microscopic keys detail characteristics visible by the naked eye or through a microscope. Drawings of plant features placed side-by-side for quick comparison accompany photo galleries of species. With an illustrated overview of bryophyte terminology and tips for collecting specimens, Ecological Guide to the Mosses and Common Liverworts of the Northeast is an invaluable resource for outdoor enthusiasts looking to learn more about these marvelous plants.