| Name | Psilocybe callosa (Fries: Fries) Gillet |
| Authorship | (Fries: Fries) Gillet |
| Rank | Species |
| Placed in | Psilocybe |
| Citation | 1876 ("1878") Hyménomycètes 586 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Psilocybe callosa (Fries: Fries) Gillet |
| Identification made in | [no date] (1) |
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