| Air Pollution, Lichens and Mosses: Brief article. |
| Arizona State University Lichen Herbarium: Information about the collection, the Sonoran Desert Lichen Flora Project, research, and online course material. |
| British Lichen Society: Advance interest in all branches of lichenology. Includes comprehensive information on British lichens. |
| Churchyard Lichens: General information. |
| Dutch Lichens: Photos and information about lichen biology. In Dutch and English. |
| Endangered Lichens: List of species protected by law in different countries. |
| European Species of the Lecanoraceae Family: Information on monograph. |
| Information about Lichens: Description, structure, and environmental importance. |
| Introduction to Lichens: Information about lichens including fossil record, life history, ecology, morphology and systematics. |
| Invasion of Pollution-tolerant Lichens: Research on the distribution of four pollution-tolerant non-native lichens in the Pacific Northwest. |
| Lichen Biology: Introduction to lichens, which are stable, self-supporting associations between fungi (most commonly Ascomycota) and photobionts (algae or cyanobacteria). Intended for university students. |
| Lichen Research Program, University of Maine at Fort Kent: Information about Steve Selva's research program in lichenology. Includes a photo gallery of stubble lichens under the microscope. |
| LichenLand: General information for young students including synoptic key and photos. |
| Lichenology in the Netherlands: Red list including lichenicolous fungi, and additional information about projects and publications. |
| Lichens - Silent Witnesses of Air Quality: Information on monitoring air quality, bibliography, and photos. |
| Lichens of North America: Information about lichen biology, lichens and wildlife, lichens and people, and the book of the same title, which was published in 2001. |
| Lichens.de: Photos of lichens taken during British Lichen Society field trips in Britain. Contains general information and related links. |
| New Zealand Forest Lichens: Photographs, general information, identification and related links. |
| North American Lichen Checklist: List of cumulative updates to the most recently published North American checklist by Esslinger and Egan (1995). |
| Queensland Lichens: General information on subtropical lichens from Queensland, Australia. Includes keys to genera and species, and glossary. |
| Rhode Island's Foliose and Fruticose Lichens: Habitat notes, distribution maps, and color photographs of over 90 species of macrolichens by Don Flenniken. |
| Roccella: Lichen genus found in Venezuela. |
| Taxonomy of Philippine Lichens: Brief information and links by researcher Isidro T. Savillo. |
Classical
