Clitopilus daamsii is an agaric fungus in the family Entolomataceae named in honor of a mycologist contributing to European fungal taxonomy. Like other Clitopilus species, it produces fruiting bodies with white to pale grey caps, crowded, decurrent gills that become pinkish at maturity due to the development of angular, pink-tinged spores, and a mealy or farinaceous odor and taste characteristic of the genus. It inhabits deciduous woodland floors, woodland margins, and occasionally grassy habitats in temperate Europe, where it fruits in autumn among leaf litter. The genus Clitopilus includes both edible species, most notably C. prunulus (the sweetbread mushroom), and potentially confusable species. Accurate identification of Clitopilus species relies on spore morphology, odor, taste, gill attachment, and habitat. C. daamsii represents the diversity of named entolomatoid species emerging from detailed European mycological surveys, reflecting ongoing efforts to document and describe the full diversity of fungal life in temperate ecosystems.