| Name | Pottia arizonica var. mucronulata Wareham |
| Authorship | Wareham |
| Rank | Variety |
| Placed in | Pottia arizonica Wareham |
| Citation | 1939 Moss Fl. N. Amer. 1: 203. pl. 95: f. 16–19 |
| Holdings | 26 Specimens held in the Harvard University Herbaria identified as Pottia arizonica var. mucronulata Wareham |
| Identification made in | [no date] (26) |