'Checklist of the British and Irish Basidiomycota' is the first checklist of this group of Fungi in the British Isles, which includes mushrooms and toadstools, bracket fungi, puffballs, earthstars and stinkhorns, club and coral fungi, tooth fungi, jelly fungi, rusts and smuts. Based on original research in the national collections of fungi at the Royal Botanic Gardens, Kew and Edinburgh, the checklist provides publication references and brief habitat, frequency and distribution details for all 3670 species recorded in the British Isles, with additional references to published illustrations and descriptions. References are given for a further 12,500 synonyms and excluded taxa (many of them old and doubtful names) with notes on why they have been removed from the current list. This is a valuable reference for all wildlife recorders and conservationists, and an essential companion for amateur and professional mycologists.