| Name | Agaricus udus Persoon: Fries |
| Authorship | Persoon: Fries |
| Rank | Species |
| Placed in | Agaricus |
| Citation | 1801 Syn. Meth. Fung. 2: 414 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Agaricus udus Persoon: Fries |
| Identification made in | [no date] (1) |