| Name | Agaricus alcalinus Fries: Fries |
| Authorship | Fries: Fries |
| Rank | Species |
| Placed in | Agaricus |
| Citation | 1818 Observ. Mycol. (Fr.) 2: 153 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Agaricus alcalinus Fries: Fries |
| Identification made in | [no date] (1) |