| Name | Ceratostoma piliferum f. dryinum (Persoon) Saccardo |
| Authorship | (Persoon) Saccardo |
| Rank | Forma |
| NomenclaturalStatus | NomLeg |
| Placed in | Ceratostoma piliferum (Fries: Fries) P. Karsten |
| Citation | 1876 Mycoth. Veneta Cent. 7: no. 658 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Ceratostoma piliferum f. dryinum (Persoon) Saccardo |
| Identification made in | [no date] (1) |