| Name | Hydrangea macrophylla subsp. serrata (Thunberg) Makino |
| Authorship | (Thunberg) Makino |
| Rank | Subspecies |
| NomenclaturalStatus | Unknown |
| Placed in | Hydrangea macrophylla (Thunberg) Seringe |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Hydrangea macrophylla subsp. serrata (Thunberg) Makino |
| Identification made in | [no date] (3) |
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