Lists a total of 965 species in 168 genera in the two volumes, describing the species including distribution maps covering Alaska, Canada, Greenland and Iceland

Lichens are a unique form of plant life, the product of a symbiotic association between an alga and a fungus. The beauty and importance of lichens have long bee

First published in 1988: This easy-to-read handbook provides a comprehensive review of the current knowledge on lichens. The structure of lichens and their dual