Current Name:Psilocybe cookei Singer, Beih. Sydowia 7: 84 (1973)
Synonymy:Agaricus semilanceatus var. caerulescens Cooke, Ill. Brit. Fung. (London) 4: pl. 573 (605) (1886)Psilocybe semilanceata var. caerulescens (Cooke) Sacc., Syll. fung. (Abellini) 5: 1051 (1887)Psilocybe cookei Singer, Beih. Sydowia 7: 84 (1973)
Position in classification:Hymenogastraceae, Agaricales, Agaricomycetidae, Agaricomycetes, Basidiomycota, Fungi