Basionym Name:Agaricus spraguei Berk. & M.A. Curtis, Ann. Mag. nat. Hist., Ser. 3 4: 285 (1859)
Homotypic synonyms:Collybia spraguei (Berk. & M.A. Curtis) Sacc., [as 'spragueii'] Syll. fung. (Abellini) 5: 208 (1887)