Entoloma politum is a common lowland species in northern Europe. It has been described to have two close species with a more intense smell, E. nitriolens and E. pernitrosum. To clarify the taxonomy of these three species, the types of E. nitriolens and E. pernitrosum, as well as many recent collections were examined by ITS sequences and morphologically. Entoloma nitriolens was found to be a sibling species of E. politum, whereas E. pernitrosum was confirmed as a synonym of E. politum. Entoloma nitriolens and E. politum are described based on own material. They grow in similar habitats, but E. nitriolens prefers colder climates and calcareous ground.