| Name | Parmelia caesia (Hoffmann) Acharius |
| Authorship | (Hoffmann) Acharius |
| Rank | Species |
| Placed in | Parmelia Acharius |
| Citation | 1803 Methodus (Acharius) 197 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Parmelia caesia (Hoffmann) Acharius |
| Identification made in | [no date] (1) |
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