| Name | Agaricus brunnescens Peck |
| Authorship | Peck |
| Rank | Species |
| Placed in | Agaricus |
| Citation | 1900 Bull. Torrey Bot. Club 27: 16 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Agaricus brunnescens Peck |
| Identification made in | [no date] (2) |
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