| Name | Euphorbia pycnanthema Engelmann |
| Authorship | Engelmann |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Euphorbia Linnaeus |
| GUID | urn:lsid:ipni.org:names:101938-2 |
| Citation | 1859 Rep. U.S. Mex. Bound., Bot. 188 |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Euphorbia pycnanthema Engelmann |
| Identification made in | [no date] (1), 1923 (1), 2008 (1) |
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