| Name | Hydrangea arborescens f. acarpa H. St. John |
| Authorship | H. St. John |
| Rank | Forma |
| NomenclaturalStatus | NomLeg |
| Placed in | Hydrangea arborescens Linnaeus |
| GUID | urn:lsid:ipni.org:names:288691-2 |
| Citation | 1921 Rhodora 23: 208 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Hydrangea arborescens f. acarpa H. St. John |
| Identification made in | [no date] (2) |
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