| Name | Lecidea crustulata f. minutissima (Vainio) Vainio |
| Authorship | (Vainio) Vainio |
| Rank | Forma |
| Placed in | Lecidea crustulata (Acharius) Sprengel |
| Citation | 1883 Meddeland. Soc. Fauna Fl. Fenn. 10: 73 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Lecidea crustulata f. minutissima (Vainio) Vainio |
| Identification made in | [no date] (2) |
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