| Name | Euphorbia longecornuta S. Watson |
| Authorship | S. Watson |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Euphorbia Linnaeus |
| GUID | urn:lsid:ipni.org:names:101621-2 |
| Citation | 1890 Proc. Amer. Acad. Arts 25: 161 |
| Holdings | 4 Specimens held in the Harvard University Herbaria identified as Euphorbia longecornuta S. Watson |
| Identification made in | [no date] (4) |
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