A Checklist and Census Catalogue of British and Irish Bryophytes Updated 2008 is the successor to a Checklist and Census Catalogue of British and Irish Bryophytes by Blockeel and Long (1998) The nomenclature has been updated to reflect recent taxonomic research, and the list is accompanied by explanatory annotations and literature references.
The 2008 Census Catalogue presents a full revision of the classification, nomenclature and vice-county distribution of British and Irish bryophytes. In 304 genera it lists 1056 species (4 hornworts, 297 liverworts, 755 mosses), 7 subspecies and 88 varieties. Genera are arranged in families and orders according to recent global taxonomic arrangements by Crandall-Stotler, Stotler & Long (2008) for liverworts and Goffinet & Buck (2004) for mosses. Nomenclature generally follows the standard British floras of Paton (1999) and Smith (2004). All deviations from the nomenclature of these floras are fully annotated. The 68764 vice-county occurrences correspond to an average 62 records per listed taxon, of which 10% are old (i.e. pre-1960) records. All listed vice-county occurrences correspond to at least one localized record in the BBS database.