| Name | Sphaerotheca castagnei f. saxifragae-rotundifoliae Spegazzini |
| Authorship | Spegazzini |
| Rank | Forma |
| NomenclaturalStatus | NomLeg |
| Placed in | Sphaerotheca castagnei Léveillé |
| Citation | 1879 Dec. Mycol. Ital. N. 9: no. 83 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Sphaerotheca castagnei f. saxifragae-rotundifoliae Spegazzini |
| Identification made in | [no date] (1) |