- Cyanosite
- Duke Lichen Herbarium
- Duke University – Biology Department
- EnDoBiodivesity.org
- Images of Lichens
- Index to American Botanical Literature
- International Association for Lichenology
- Lichen determination keys
- Links to Lichens and Lichenologists
- Mycological Society of America (MSA)
- Mycocosm (JGI)
- Myconet
- National Center for Biotechnology Information
- National Science Foundation
- NSF Research.gov
- North American Lichen Checklist
- North American Lichens and Bryophytes: Sensitive Indicators of Environmental Quality and Change
- Phylogeny Software Programs
- Stamatakis Lab
- Sharnoff’s photos of lichens
- Tree of Life web project (ToL)