| Name | Usnea subgracilis Vainio |
| Authorship | Vainio |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Usnea Dillenius ex Adanson |
| Citation | 1915 Ann. Acad. Sci. Fenn., Ser. A 6(7): 7 |
| Holdings | 12 Specimens held in the Harvard University Herbaria identified as Usnea subgracilis Vainio |
| Identification made in | [no date] (12) |
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