| Name | Echinocereus rigidissimus (Engelmann) Rose |
| Authorship | (Engelmann) Rose |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Echinocereus |
| GUID | urn:lsid:ipni.org:names:1076186-2 |
| Holdings | 4 Specimens held in the Harvard University Herbaria identified as Echinocereus rigidissimus (Engelmann) Rose |
| Identification made in | [no date] (4) |