Basionym: Agaricus cinereus Schaeff., Fungorum qui in Bavaria et Palatinatu circa Ratisbonam nascuntur Icones 4: 43, t. 100 (1774) [MB#217532] Obligate synonyms: - Coprinus cinereus (Schaeff.) Gray, A natural arrangement of British plants 1: 634 (1821) [MB#179262] - Coprinus fimetarius var. cinereus (Schaeff.) Fr., Epicrisis Systematis Mycologici: 246 (1838) [MB#438185] - Agaricus radians Batsch, Elenchus fungorum: 61 (1783) [MB#490389] - Coprinopsis cinerea var. cinerea (2001) [MB#833631] Taxonomic synonyms: - Coprinus delicatulus Apinis, Transactions of the British Mycological Society 48 (4): 653 (1965) [MB#328860] - Agaricus macrorhizus Pers., Observationes mycologicae 1: 47 (1796) [MB#490281] - Coprinus macrorhizus (Pers.) Rea, British Basidiomycetae: A handbook to the larger British fungi: 503 (1922) [MB#270155] - Coprinus fimetarius var. macrorhizus (Pers.) Sacc., Sylloge Fungorum 5: 1087 (1887) [MB#164911]