| Name | Inocybe longicystis G. F. Atkinson |
| Authorship | G. F. Atkinson |
| Rank | Species |
| Placed in | Inocybe |
| Citation | 1918 Amer. J. Bot. 5: 213 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Inocybe longicystis G. F. Atkinson |
| Identification made in | [no date] (2) |