A number of gilled mushrooms are similar-looking, including those where the cap becomes upturned in age, exposing the gills. Such mushrooms differ by having "true" (i.e., blade-like) gills rather than forking, veinlike ridges. The poisonous Omphalotus olivascens
differs in that it has true gills and grows in clusters where the stems are fused. The poisonous Paxillus involutus
differs in that it has a brownish cap, true gills, and a brown spore deposit.