| Name | Grimmia tenuicaulis R. S. Williams |
| Authorship | R. S. Williams |
| Rank | Species |
| Placed in | Grimmia |
| Citation | 1900 Bull. Torrey Bot. Club 27: 316. 20. |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Grimmia tenuicaulis R. S. Williams |
| Identification made in | [no date] (1) |
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