Bryology http://www.uni-bonn.de/bryologie/
Information about taxonomy, nomenclature, ecology and bioindication provided by the university of Bonn. Available in German and English.
The David Cove Group http://www.plants.leeds.ac.uk/groups_cov.html
Prof David Cove, based at Leeds University, carries out research on plant development using mosses, primarily Physcomitrella patens and Ceratodon purpureus. This site gives an overview of his work and a list of publications.
Tropical Bryology Research http://www.oshea.demon.co.uk/tbr/
Formed in October 1997 by Brian O'Shea and Martin Wigginton to further bryological research in the tropics (particularly in Africa), to act for an ad hoc association of bryologists with expertise in this area.