| Name | Physcia thomsoniana Esslinger |
| Authorship | Esslinger |
| Rank | Species |
| Placed in | Physcia (Schreber) Michaux |
| Citation | 2017 Opusc. Philolichenum 16: 140 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Physcia thomsoniana Esslinger |
| Identification made in | [no date] (2) |
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