Abstract: Three species are recognized in the Tricholoma caligatum group in Europe: T. caligatum (Viv.) Ricken, T. nauseosum (Blytt) Kytöv., comb. nova, and T. dulciolens Kytöv., spec. nova. The first two species are also reported from North Africa. The East Asian T. matsutake (S. Ito & Imai) Singer is included in T. nauseosum, which is thus an edible fungus of major international interest. The distribution of each species in the study area is mapped, and their ecology and relationships are discussed.