| Name | Euphorbia bicolor var. concolor Engelmann & A. Gray |
| Authorship | Engelmann & A. Gray |
| Rank | Variety |
| NomenclaturalStatus | NomLeg |
| Placed in | Euphorbia bicolor Engelmann & A. Gray |
| GUID | urn:lsid:ipni.org:names:101329-2 |
| Citation | 1845 Boston J. Nat. Hist. 5: 233 |
| Holdings | 4 Specimens held in the Harvard University Herbaria identified as Euphorbia bicolor var. concolor Engelmann & A. Gray |
| Identification made in | 1938 (1), 2008 (3) |
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