| Name | Sidalcea nelsoniana Piper |
| Authorship | Piper |
| Rank | Species |
| Placed in | Sidalcea |
| Citation | 1919 Proc. Biol. Soc. Washington 32: 41 |
| Holdings | 20 Specimens held in the Harvard University Herbaria identified as Sidalcea nelsoniana Piper |
| Identification made in | [no date] (19), 1952 (1) |
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