Basionym:
Agaricus americanus Peck, Rep. (Annual) New York State Mus. Nat. Hist. 23: 71 (1872) [MB#466262]
Obligate synonyms:
- Leucocoprinus americanus (Peck) Redhead, Edible and poisonous mushrooms of Canada: 323 (1979) [MB#316813]
- Leucoagaricus americanus (Peck) Vellinga, Mycotaxon 76: 433 (2000) [MB#466261]
- Lepiota americana (Peck) Sacc., Syll. Fung. 5: 43 (1887) [MB#248928]
Taxonomic synonyms:
- Agaricus cupreus Schulzer, Verh. Zool.-Bot. Ges. Wien 27: 112 (1877) [MB#199842]
- Leucoagaricus bresadolae (Schulzer) Bon, Doc. Mycol. 7 (27-28): 15 (1977) [MB#316771]
- Lepiota bresadolae Schulzer, Hedwigia 24 (4): 132 (1885) [MB#237418]
- Psalliota bresadolae Schulzer, Hedwigia 24 (4): 135 (1885) [MB#547413]
- Leucocoprinus bresadolae (Schulzer) M.M. Moser, Kleine Krypt.-Fl. 2b (2): 186 (1967) [MB#114849]
- Leucocoprinus bresadolae (Schulzer) Wasser, Novosti Sist. Nizsh. Rast.: 221 (1978) [MB#250484]
- Chamaeceras bresadolae (Schulzer) Kuntze, Revisio generum plantarum 3 (3): 455 (1898) [MB#524117]
- Fungus bresadolae (Schulzer) Kuntze, Revisio generum plantarum 3 (3): 479 (1898) [MB#526355]
- Agaricus bresadolae (Schulzer) Sacc., Syll. Fung. 5: 1005 (1887) [MB#215022]