| Name | Hysterographium lineare f. aceris P. Karsten |
| Authorship | P. Karsten |
| Rank | Forma |
| Placed in | Hysterographium lineare (Fries: Fries) P. Karsten |
| Citation | 1866 Fungi Fenniae Exsicc. 4: 333 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Hysterographium lineare f. aceris P. Karsten |
| Identification made in | [no date] (1) |
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