Species of the genus Tricholoma are a common component of our autumn woodlands, with around 50 species known from Britain. The genus comprises both edible and toxic species, many with subtle and beautiful colours. The Genus Tricholoma in Britain provides identification keys to these species plus others known from mainland Europe which may be found here in the future. Full descriptions and discussion of the species are provided along with nearly 60 full colour photographs of the majority of the British species. The Genus Tricholoma in Britain represents the first English language study of the British species of this intriguing group.