| Name | Usnea longissima Acharius |
| Authorship | Acharius |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Usnea Dillenius ex Adanson |
| Contains | Usnea longissima var. corticata Howe Usnea longissima f. tenuis Th. Fries |
| GUID | urn:lsid:indexfungorum.org:names:356462 |
| Holdings | 88 Specimens held in the Harvard University Herbaria identified as Usnea longissima Acharius |
| Identification made in | [no date] (86), 2005 (2) |
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