| Name | Acanthopanax stenophyllus f. dilatatus Rehder |
| Authorship | Rehder |
| Rank | Forma |
| NomenclaturalStatus | NomLeg |
| Placed in | Acanthopanax stenophyllus Harms |
| Citation | 1932 J. Arnold Arbor. 13: 339 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Acanthopanax stenophyllus f. dilatatus Rehder |
| Identification made in | [no date] (1) |