| Name | Grimmia hamulosa Lesquereux |
| Authorship | Lesquereux |
| Rank | Species |
| Placed in | Grimmia |
| Citation | 1868 Mem. Calif. Acad. Sci. 1: 14 |
| Holdings | 9 Specimens held in the Harvard University Herbaria identified as Grimmia hamulosa Lesquereux |
| Identification made in | [no date] (9) |
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