| Name | Alnus firma Siebold & Zuccarini |
| Authorship | Siebold & Zuccarini |
| Rank | Species |
| Placed in | Alnus |
| Citation | 1846 Abh. Math.-Phys. Cl. Königl. Bayer. Akad. Wiss. 4(3): 229 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Alnus firma Siebold & Zuccarini |
| Identification made in | [no date] (1) |
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