| Opuntia engelmannii |
| Authority | : | Salm-Dyck ex Engelm. 1850 |
| Español | : | nopal arrastradillo, nopal cuijo, nopal de Engelmann |
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| Zion National Park (Utah), USA; 11 August 2017. | ||
| Opuntia erinacea |
| Authority | : | Engelm. & J.M.Bigelow, 1856 |
| Synonyms | : | Opuntia polyacantha var. erinacea (Engelm. & J.M.Bigelow) B.D.Parfitt, 1998 |
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| Big Water (Utah), USA; 6 August 2017. |
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| Beaver dam (Arizona), USA; 5 August 2017. | |