Basionym Name:Agaricus irregularis Bolton, Hist. fung. Halifax (Huddersfield) 1: 13 (1788)
Homotypic synonyms:Agaricus castaneus var. irregularis (Bolton) Fr., Observ. mycol. (Havniae) 2: 43 (1818)Hydrocybe irregularis (Bolton) Ricken, Die Blätterpilze: 185 (1912)