| Name | Rosa palustris f. inermis (Regel) W. H. Lewis |
| Authorship | (Regel) W. H. Lewis |
| Rank | Forma |
| Placed in | Rosa palustris Marshall |
| Holdings | 7 Specimens held in the Harvard University Herbaria identified as Rosa palustris f. inermis (Regel) W. H. Lewis |
| Identification made in | [no date] (6), 1956 (1) |