Basionym:
Agaricus birrus Fr., Epicrisis Systematis Mycologici: 179 (1838) [MB#463459]
Obligate synonyms:
- Hylophila birra (Fr.) Quél., Enchiridion Fungorum in Europa media et praesertim in Gallia Vigentium: 99 (1886) [MB#802712]
- Hebeloma birrum (Fr.) Sacc. (1887) [MB#237491]
- Hebeloma birrum var. birrum (Fr.) Sacc. (1887) [MB#430582]
- Hebeloma birrus (Fr.) Sacc., Sylloge Fungorum 5: 794 (1887) [MB#630143]
Taxonomic synonyms:
- Hebeloma calyptrosporum Bruchet, Bull. Mens. Soc. Linn. Lyon 39: 125 (1970) [MB#314950]
- Hebelomatis calyptrosporum (Bruchet) Locq., Flore mycologique 3: 146 (1979) [MB#314986]
- Agaricus longicaudus var. radicatus Cooke, Illustrations of British Fungi 26: 459 (416) (1886) [MB#625640]
- Hebeloma longicaudum var. radicatum (Cooke) Sacc., Syll. Fung. 5: 801 (1887) [MB#138920]
- Hebelomatis radicatum (Cooke) Locq., Flore mycologique 3: 146 (1979) [MB#315015]
- Hebeloma radicatum (Cooke) Maire, Bull. Trimestriel Soc. Mycol. France 24 (2): LVII (1908) [MB#463648]
- Agaricus longicaudus var. radiatus Cooke, Illustrations of British Fungi (Hymenomycetes) (1886) [MB#484245]