| Name | Leptogium marginellum (Swartz) S. Gray |
| Authorship | (Swartz) S. Gray |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Leptogium (Acharius) Gray |
| Contains | Leptogium marginellum var. isidiosellum Riddle |
| Citation | 1821 Nat. Arr. Brit. Pl. 1: 401 |
| Holdings | 50 Specimens held in the Harvard University Herbaria identified as Leptogium marginellum (Swartz) S. Gray |
| Identification made in | [no date] (40), 1984 (5), 2009 (1), 2015 (4) |