| Name | Hydrangea petiolaris f. formosa M. Mizushima |
| Authorship | M. Mizushima |
| Rank | Forma |
| NomenclaturalStatus | NomLeg |
| Placed in | Hydrangea petiolaris Siebold & Zuccarini |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Hydrangea petiolaris f. formosa M. Mizushima |
| Identification made in | [no date] (1) |
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