| Name | Usnea baileyi f. implexa Zahlbruckner |
| Authorship | Zahlbruckner |
| Rank | Forma |
| Placed in | Usnea baileyi (Stirton) Zahlbruckner |
| Citation | 1909 Denkschr. Kaiserl. Akad. Wiss., Wien. Math.-Naturwiss. Kl. 83: 191 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Usnea baileyi f. implexa Zahlbruckner |
| Identification made in | [no date] (1) |
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