| Name | Agaricus caudatus Fries |
| Authorship | Fries |
| Rank | Species |
| Placed in | Agaricus |
| Citation | 1818 Observ. Mycol. (Fr.) 2: 187 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Agaricus caudatus Fries |
| Identification made in | [no date] (1) |