Clitocybe marginella is a small agaric fungus in the family Tricholomataceae found in temperate European woodland and semi-open habitats. Like many members of the diverse Clitocybe genus, it produces modest fruiting bodies with a depressed to funnel-shaped cap and decurrent gills running down the stipe, typically whitish to pale buff in coloration. The species fruits in autumn, colonizing leaf litter, humus-rich soils, and woodland margins where it functions as a saprotrophic decomposer. The epithet marginella may reference subtle marginal features of the cap or gills that help distinguish it from closely related species. Identification within this genus typically requires microscopic examination of spore size and shape, along with assessment of odor, taste, and substrate preferences. European Clitocybe diversity is significant, with dozens of species recorded across forest, grassland, and heathland habitats. C. marginella contributes to the intricate web of decomposer fungi that recycle nutrients in temperate forest ecosystems throughout Northwestern and Central Europe.