Lichens are composite organisms composed of fungal species in a symbiotic relationship with algae and/or cyanobacteria. Although lichens are classified and named based on the fungal component, they are here presented separately from fungi for convenience of access.
Description: Thallus greenish-grey, lobes 1-2 mm wide, puffed, with obvious perforations, lower surface black and without rhizines.
Distribution: West of Cascades crest in Washington; northern British Columbia to northern California; Minnesota, Wisconsin, Michigan, Maine to Georgia; Quebec, Ontario.
Habitat: Damp forest.
Substrate: On bark of deciduous trees.