| Name | Aecidium crassum f. rhamni-saxatilis Saccardo |
| Authorship | Saccardo |
| Rank | Forma |
| NomenclaturalStatus | NomLeg |
| Placed in | Aecidium crassum Persoon: Persoon |
| Citation | 1876 Mycoth. Veneta Cent. 9: no. 884 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Aecidium crassum f. rhamni-saxatilis Saccardo |
| Identification made in | [no date] (1) |
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