| Name | Physcia ciliata f. fibrillosa J. W. Thomson |
| Authorship | J. W. Thomson |
| Rank | Forma |
| Placed in | Physcia ciliata (Hoffmann) Du Rietz |
| Citation | 1963 Nova Hedwigia Beih. 7: 114 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Physcia ciliata f. fibrillosa J. W. Thomson |
| Identification made in | [no date] (1) |
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