The first comprehensive checklist of the fungi of Great Britain and Ireland, providing publication references and brief habitat, frequency and distribution details for all 3,760 species of mushroom, toadstool, bracket fungus, puffball, earthstar, stinkhorn, club and coral, tooth and jelly, fungus as well as the rusts and smuts, recorded in the British Isles. References are also given for a further 12,500 synonyms and excluded taxa (many being old or doubtful names), with notes on the reasons for their exclusion from the current listing. An essential companion for amateur and professional mycologists, and a valuable reference tool for all wildlife recorders, ecologists and conservationists.