Excerpt from Marine Flora and Fauna of the Northeastern United States: Lichens (Ascomycetes) Of the Intertidal Region Lichens may be found in a continuous range of habitats from low tide to mountain tops. The species included in this manual are those found in the intertidal zone plus the normal spray zone but not what is often called the storm spray zone. Some ofthe lichens in this manual are obligate marine lichens, i.e.. They grow only where they are struck directly by saltwater. Others are facultative. Being found also in areas remote from the sea. My criterion for including a facultative lichen is its occurrence with. Or at the same height on the shore as. An obligate marine species. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.