| Name | Peltigera membranacea f. prolifera J. W. Thomson |
| Authorship | J. W. Thomson |
| Rank | Forma |
| Placed in | Peltigera membranacea (Acharius) Nylander |
| Citation | 1950 Amer. Midl. Naturalist 44: 65 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Peltigera membranacea f. prolifera J. W. Thomson |
| Identification made in | [no date] (1) |