| Name | Cladonia deformis f. crenulata (Acharius) Nylander |
| Authorship | (Acharius) Nylander |
| Rank | Forma |
| Placed in | Cladonia deformis (Linnaeus) Hoffmann |
| Holdings | 20 Specimens held in the Harvard University Herbaria identified as Cladonia deformis f. crenulata (Acharius) Nylander |
| Identification made in | [no date] (20) |