Key
James P. Bennett and Clifford M. Wetmore
Species Count: 191
Acarosporaceae
Arthoniaceae
Caliciaceae
Candelariaceae
Catillariaceae
Cladoniaceae
Collemataceae
Coniocybaceae
Graphidaceae
Gyalectaceae
Lecanoraceae
Lecideaceae
Megasporaceae
Monoblastiaceae
Mycocaliciaceae
Naetrocymbaceae
Ochrolechiaceae
Opegraphaceae
Ophioparmaceae
Parmeliaceae
Peltigeraceae
Pertusariaceae
Physciaceae
Pilocarpaceae
Pyrenulaceae
Ramalinaceae
Sarrameanaceae
Scoliciosporaceae
Sphinctrinaceae
Stereocaulaceae
Teloschistaceae
Thelenellaceae
Thrombiaceae
Trapeliaceae
Verrucariaceae