Links:

American Bryological and Lichenological Society (ABLS) - http://www.unomaha.edu/~abls/

Database of Lichens in the U.S. National Parks - http://www.ies.wisc.edu/nplichen/

Eastern Lichen Network - http://www.nybg.org/bsci/lichens/eln/

Field Museum Lichens - http://www.fieldmuseum.org/research_collections/botany/research_fungi.htm

Forest Inventory and Analysis: Lichens - http://fia.fs.fed.us/program-features/indicators/lichen/

Global Information System for Lichenized and Non-Lichenized Ascomycetes (LIAS) - http://www.lias.net/

Guide to the N.A. Literature - http://www.huh.harvard.edu/collections/lichens/guide/guidetoliterature.html

International Association for Lichenology - http://www.lichenology.org

Introduction to Lichens - http://www.ucmp.berkeley.edu/fungi/lichens/lichens.html

ITALIC Iconographic Archive - http://dbiodbs.univ.trieste.it/italic/italic02b

Into the World of Lichens - http://www.gardenbuildingsdirect.co.uk/Article/into-the-world-of-lichens

Lichen Identification Keys Available on the Internet - http://www.bgbm.fu-berlin.de/sipman/keys/

Lichens of North America - http://www.lichen.com/

Missouri Annotated Lichen Checklist - http://mdc.mo.gov/nathis/lichens/

North American Lichen Checklist - http://www.ndsu.nodak.edu/instruct/esslinge/chcklst/chcklst7.htm

Oslo (O) Lichen Photo Gallery - http://www.nhm.uio.no/lichens/

Photo Archive of Acharius's Lichen Types - http://www.google.com/search?hl=vGt&q=acharius+types=&btnI=I%27m+Feeling+Lucky

R6 Lichens Homepage: Air Quality Biomonitoring Program - http://www.fs.fed.us/r6/aq/lichen/

Recent Literature on Lichens - http://www.toyen.uio.no/botanisk/bot-mus/lav/sok_rll.htm

Sonoran Desert Lichen Flora Project - http://nhc.asu.edu/lichens/flora/flora.jsp

Ticolichen - http://www.fieldmuseum.org/research_collections/botany/botany_sites/ticolichen/index.html

  Individuals' Websites:

Brendan Hodkinson - http://www.duke.edu/~bph8/

Bruce McCune - http://oregonstate.edu/~mccuneb/

Christoph Scheiddeger - http://www.wsl.ch/staff/christoph.scheidegger/

Cliff Wetmore - http://www.tc.umn.edu/~wetmore/

Harrie Sipman - http://www.bgbm.fu-berlin.de/sipman/default.htm

Helmut Mayrhofer - http://www.uni-graz.at/~mayrhof/

Irwin Brodo - http://www.lichen.com/author.html

James Lendemer - http://www.nybg.org/science/scientist_profile.php?id_scientist=89

Katalin Molnar - http://katalinmolnar.com/

Leif Tibell - http://www.systbot.uu.se/staff/l_tibell/l_tibell.html

Louise Lindblom - http://web.telia.com/~u46506521/Louise/louise.htm

Lutzoni Lab - http://www.lutzonilab.net/

Martin Grube - http://www.uni-graz.at/~grubem/home.html

Martin Westberg - http://www.planteco.lu.se/people/mw/

Matthias Schultz - http://www.biologie.uni-hamburg.de/bzf/fbca002/fbca002.htm

Robert Egan - http://avalon.unomaha.edu/lichens/

Robert Lücking - http://fm1.fieldmuseum.org/aa/staff_page.cgi?staff=rlucking

Roland Moberg - http://www-hotel.uu.se/evolmuseum/fytotek/homepage/RMinfo.htm

Scott Bates's Lichenology Resources - http://www.azfungi.org/stbates/lichenology.html

Starri Heidmarsson - http://www.systbot.uu.se/staff/old/s_heidmarsson/s_heidmarsson.html

  Journals/Periodicals/Series:

Bibliotheca Lichenologica - http://www.balogh.com/schweizerbart/bibliotheca_lichenologica.html

Herzogia - http://www.blam.privat.t-online.de/herzogia.html

International Journal of Mycology and Lichenology - http://www.borntraeger-cramer.de/

International Lichenological Newsletter - http://www.bgbm.org/ial/newsletter/home.htm

Myconet - http://www.fieldmuseum.org/myconet/

Mycotaxon (Mycotaxon LTD) - http://www.mycotaxon.com/default.html

Opusculum Philolichenum - http://clade.acnatsci.org/lendemer/opus.html

The Bryologist (ABLS Inc.) - http://www.unomaha.edu/~abls/bryologist.html

The Lichenologist (Elsevier) - http://www.unomaha.edu/~abls/lichenologist.html