Lichen Sites
A
Cumulative Checklist for the Lichen-forming, Lichenicolous and Allied Fungi
of the Continental United States and Canada
Lichen
Information System: International Lichen Pictures Collection
The Lichen Research
Program at the University of Maine at Fort Kent
International Association of
Lichenologists
Recent
Literature on Lichens
Fun with Lichens
Smithsonian Lichen
Research
A Preliminary Key to
Calicioid Lichens and Fungi in the Pacific Northwest