| Name | Phacidium coronatum f. quercus P. Karsten |
| Authorship | P. Karsten |
| Rank | Forma |
| NomenclaturalStatus | NomLeg |
| Placed in | Phacidium coronatum (Schumacher) Fries: Fries |
| Citation | 1866 Fungi Fenniae Exsicc. 5: 466 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Phacidium coronatum f. quercus P. Karsten |
| Identification made in | [no date] (1) |
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