| Name | Leptogium byssinum (Hoffmann) Zwackh ex Nylander |
| Authorship | (Hoffmann) Zwackh ex Nylander |
| Rank | Species |
| Placed in | Leptogium (Acharius) Gray |
| Citation | 1856 Bull. Soc. Linn. Bordeaux 21: 270 |
| Holdings | 7 Specimens held in the Harvard University Herbaria identified as Leptogium byssinum (Hoffmann) Zwackh ex Nylander |
| Identification made in | [no date] (3), 1963 (1), 2003 (3) |