Basionym Name:Agaricus caespititius Berk., Hooker's J. Bot. Kew Gard. Misc. 2: 110 (1850)
Homotypic synonyms:Psilocybe caespititia (Berk.) Sacc., [as 'caespiticia'] Syll. fung. (Abellini) 5: 1053 (1887)