• American Bryological and Lichenological Society
  Lichen classes, workshops, seminars country-wide
• Arizona State University Lichen Herbarium
• British Lichen Society
• Northwest Lichenologists, Inc.:
• Lichens at the Smithsonian
• The Natural History Museum (London) Lichen Guide
• The R6 Lichens HomePage:
• Lichenland at Oregon State University
• Illinois Mycological Association:
• University of Hawaii:
• Lichens at Minnesota:
• Wayne Armstrong's lichen pages
• Lichens of North America Site
• California Native Plant Society
• International Association of Lichenologists (IAL)
• Lichenology in the Netherlands, http://www.biodiv.nl/lichens/index.htm
• Bryological and Lichenological section of the Czech Botanical Society, http://botanika.bf.jcu.cz/BLS/english/online_en.html
• Hattori Botanical Laboratory of Japan, http://www7.ocn.ne.jp/%7Ehattorib/
• Societa' Lichenologica Italiana, http://dbiodbs.univ.trieste.it/sli/home.html#sli
• Swiss Association of Bryology and Lichenology, http://www.bryolich.ch/english/index_engl.html
• Association Française de Lichénologie, http://www.lichenologie.org/