| Name | Euphorbia piluliferus var. discolor Engelmann |
| Authorship | Engelmann |
| Rank | Variety |
| NomenclaturalStatus | NomLeg |
| Placed in | Euphorbia piluliferus Linnaeus |
| Citation | 1859 Rep. U.S. Mex. Bound., Bot. 188 |
| Holdings | 5 Specimens held in the Harvard University Herbaria identified as Euphorbia piluliferus var. discolor Engelmann |
| Identification made in | [no date] (2), 2008 (3) |