| Name | Thelocactus bicolor var. schottii (Engelmann) Krainz |
| Authorship | (Engelmann) Krainz |
| Rank | Variety |
| Placed in | Thelocactus bicolor (Galeotti ex Pfeiffer) Britton & Rose |
| Citation | 1961 Kakteen (H. Krainz) 18: C VIIIb |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Thelocactus bicolor var. schottii (Engelmann) Krainz |
| Identification made in | [no date] (2) |
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