| Name | Geranium rosthornii R. Knuth |
| Authorship | R. Knuth |
| Rank | Species |
| Placed in | Geranium Linnaeus |
| Citation | 1912 Pflanzenr. [Engler] Geraniac. 180 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Geranium rosthornii R. Knuth |
| Identification made in | [no date] (2) |
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