Basionym: Agaricus mollis Schaeff., Fungorum qui in Bavaria et Palatinatu circa Ratisbonam nascuntur Icones 4: 49, tab. 213 (1774) [MB#219717] Obligate synonyms: - Crepidopus mollis (Schaeff.) Gray, A natural arrangement of British plants 1: 616 (1821) [MB#486506] - Derminus mollis (Schaeff.) J. Schröt., Kryptogamen-Flora von Schlesien 3-1(5): 578 (1889) [MB#356584] - Agaricus gelatinosus J.F. Gmel., Systema Naturae 2 (2): 1429 (1792) [MB#490226] - Agaricus canescens Batsch, Elenchus fungorum: 95, t. 9:38 (1783) [MB#495312] Taxonomic synonyms: - Agaricus alveolus Lasch, Linnaea 4: 547 (1829) [MB#375117] - Crepidotus alveolus (Lasch) P. Kumm., Der Führer in die Pilzkunde: 74 (1871) [MB#184331] - Crepidotus mollis var. alveolus (Lasch) Quélet, Enchiridion Fungorum in Europa media et praesertim in Gallia Vigentium: 108 (1886) [MB#803032] - Agaricus chimonophilus Berk. & Broome, Ann. Mag. nat. Hist. (1854) [MB#457269] - Agaricus ralfsii Berk. & Broome, Annals and Magazine of Natural History 12: 372 (1883) [MB#457270] - Crepidotus ralfsii (Berk. & Broome) Sacc., Sylloge Fungorum 5: 881 (1887) [MB#213913] - Crepidotus fraxinicola Murrill, North American Flora 10 (3): 150 (1917) [MB#185823] - Crepidotus alabamensis Murrill, North American Flora 10 (3): 150 (1917) [MB#190205] - Agaricus mollis Schrad., Spicilegium Florae Germanicae: 133 (1794) [MB#490299]