| Name | Agaricus retirugus Fries |
| Authorship | Fries |
| Rank | Species |
| Placed in | Agaricus |
| Citation | 1838 Epicr. Syst. Mycol. 235 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Agaricus retirugus Fries |
| Identification made in | [no date] (1) |
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