Key
James P. Bennett and Clifford M. Wetmore
Species Count: 469
Acarosporaceae
Arthoniaceae
Arthrorhaphidaceae
Baeomycetaceae
Caliciaceae
Candelariaceae
Chrysotrichaceae
Cladoniaceae
Collemataceae
Coniocybaceae
Cystocoleaceae
Fuscideaceae
Graphidaceae
Hymeneliaceae
Icmadophilaceae
Lecanoraceae
Lecideaceae
Leprocaulaceae
Lichenotheliaceae
Massalongiaceae
Megasporaceae
Mycocaliciaceae
Ochrolechiaceae
Ophioparmaceae
Pannariaceae
Parmeliaceae
Peltigeraceae
Pertusariaceae
Phlyctidaceae
Physciaceae
Pilocarpaceae
Placynthiaceae
Porocyphaceae
Psoraceae
Ramalinaceae
Rhizocarpaceae
Schaereriaceae
Sporastatiaceae
Stereocaulaceae
Teloschistaceae
Tephromelataceae
Trapeliaceae
Umbilicariaceae
Verrucariaceae