| Name | Echinomastus johnsonii (Parry ex Engelmann) E. M. Baxter |
| Authorship | (Parry ex Engelmann) E. M. Baxter |
| Rank | Species |
| Placed in | Echinomastus Britton & Rose |
| Citation | 1935 Calif. Cact. 75 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Echinomastus johnsonii (Parry ex Engelmann) E. M. Baxter |
| Identification made in | [no date] (2) |
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