One of America's oldest botanical organisations, the ABLS is devoted to the scientific study of all aspects of the biology of bryophytes and lichen-forming fungi. There is limited descriptive information. The site is maintained by the Society's current Assistant Treasurer.
Presentation is generally slightly poor.
This impressive site, compiled by Tassilo Feuerer at the University of Hamburg, provides links to 19 national checklists available on the Internet supplemented by information about other countries not covered by full lists. Lists are accessed either from an alphabetical country index or by clicking through hyper-linked maps. End resources include externally held national lists and preliminary lists developed by the author and held locally. This site from the University of Tartu, Estonia, provides a focal point for resources relating to lichens and lichenology in Estonia. Resources include a directory of Estonian lichenologists, a history of lichenology in Estonia, and an overview of the lichen herbarium of the University of Tartu.