| Name | Polyporus vaporarius f. macer (Sommerfelt) Saccardo |
| Authorship | (Sommerfelt) Saccardo |
| Rank | Forma |
| NomenclaturalStatus | NomLeg |
| Placed in | Polyporus vaporarius (Persoon) Fries: Fries |
| Citation | 1879 Mycoth. Veneta Cent. XIV: no. 1305 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Polyporus vaporarius f. macer (Sommerfelt) Saccardo |
| Identification made in | [no date] (1) |
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