| Name | Euphorbia hirtula Engelmann |
| Authorship | Engelmann |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Euphorbia Linnaeus |
| Citation | 1880 Bot. California 2: 74 |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Euphorbia hirtula Engelmann |
| Identification made in | [no date] (2), 1934 (1) |