| Name | Irpex crassus Berkeley & M. A. Curtis |
| Authorship | Berkeley & M. A. Curtis |
| Rank | Species |
| Placed in | Irpex |
| Citation | 1849 Hooker's J. Bot. Kew Gard. Misc. 1: 236 |
| Holdings | 9 Specimens held in the Harvard University Herbaria identified as Irpex crassus Berkeley & M. A. Curtis |
| Identification made in | [no date] (9) |
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