Delmarva Lichens is the first comprehensive lichen flora presented in modern times for eastern North America and the only treatment of the macro- and micro-lichens in the mid-Atlantic region. The authors, James Lendemer and Nastassja Noell, include the 299 species of lichens documented from Delmarva, presented in a current phylogenetic arrangement, providing identification keys, descriptions, maps of species distributions, a color image for nearly all those treated, along with proposed conservation status.