| Name | Euphorbia sieboldiana C. Morren & Decaisne |
| Authorship | C. Morren & Decaisne |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Euphorbia Linnaeus |
| Holdings | 4 Specimens held in the Harvard University Herbaria identified as Euphorbia sieboldiana C. Morren & Decaisne |
| Identification made in | [no date] (2), 2008 (2) |