| Name | Pediocactus simpsonii var. nigrispinus F. Hochstätter |
| Authorship | F. Hochstätter |
| Rank | Variety |
| Placed in | Pediocactus simpsonii (Engelmann) Britton & Rose |
| Citation | 1990 Succulenta (Netherlands) 69(9): 178–179, f. 1–6 |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Pediocactus simpsonii var. nigrispinus F. Hochstätter |
| Identification made in | [no date] (3) |
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