| Name | Betula japonica var. rockii Rehder |
| Authorship | Rehder |
| Rank | Variety |
| NomenclaturalStatus | NomLeg |
| Placed in | Betula japonica Siebold |
| Citation | 1928 J. Arnold Arbor. 9: 25 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Betula japonica var. rockii Rehder |
| Identification made in | [no date] (2) |
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