Basionym:
Agaricus giganteus Sowerby, Coloured Figures of English Fungi Supplement: pl. 420, t. 420 (1809) [MB#221740]
Obligate synonyms:
- Leucopaxillus giganteus (Sowerby) Singer, Bot. Mater. Otd. Sporov. Rast. Bot. Inst. Komarova Akad. Nauk S.S.S.R. 4 (10-12): 8 (1938) [MB#283342]
- Clitocybe gigantea (Sowerby) Quél., Mém. Soc. Émul. Montbéliard Ser. 2, 5: 88 (1872) [MB#265959]
- Paxillus giganteus (Sowerby) Fr., Hymenomycetes europaei: 401 (1874) [MB#185382]
- Omphalia geotropa var. gigantea (Sowerby) Quél., Enchiridion Fungorum in Europa media et praesertim in Gallia Vigentium: 23 (1886) [MB#500435]
Taxonomic synonyms:
- Clitocybe candida Bres., Fungi tridentini 1 (2): 16, tab. XVIII (1882) [MB#176787]
- Leucopaxillus candidus (Bres.) Singer, Rev. Mycol. (Paris) 4: 68 (1939) [MB#259613]
- Aspropaxillus candidus (Bres.) M.M. Moser, Kleine Kryptogamenflora von Mitteleuropa - Die Blätter- und Bauchpilze (Agaricales und Gastromycetes) 2: 4 (1953) [MB#292869]
- Aspropaxillus candidus (Bres.) Raithelh., Metrodiana 1 (1): 4 (1970) [MB#632040]
- Leucopaxillus septentrionalis Singer & A.H. Sm., Mycologia 39 (6): 726 (1948) [MB#287766]
- Clitocybe septentrionalis (Singer & A.H. Sm.) H.E. Bigelow, Canad. J. Bot. 37 (5): 772 (1959) [MB#295165]
- Aspropaxillus septentrionalis (Singer & A.H. Sm.) Vizzini, Mycosphere 3 (1): 83 (2012) [MB#564422]