| Name | Grimmia ambigua (Sullivant) Sullivant |
| Authorship | (Sullivant) Sullivant |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Grimmia |
| Citation | 1864 Icon. Musc. (Sullivant) 66. 41 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Grimmia ambigua (Sullivant) Sullivant |
| Identification made in | [no date] (1) |