| Name | Euphorbia melanadenia var. subappendiculata Engelmann |
| Authorship | Engelmann |
| Rank | Variety |
| NomenclaturalStatus | NomLeg |
| Placed in | Euphorbia melanadenia Torrey |
| Citation | 1861 Proc. Amer. Acad. Arts 5: 172 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Euphorbia melanadenia var. subappendiculata Engelmann |
| Identification made in | [no date] (2) |
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