| Name | Usnea arizonica Motyka | 
| Authorship | Motyka | 
| Rank | Species | 
| Placed in | Usnea Dillenius ex Adanson | 
| GUID | urn:lsid:indexfungorum.org:names:412006 | 
| Citation | 1936 Usnea 1: 248 | 
| Holdings | 15 Specimens held in the Harvard University Herbaria identified as Usnea arizonica Motyka | 
| Identification made in | [no date] (15) |