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]