| Cactaceae | |
Thelocactus bicolor subsp. bicolor
| | | |
| Cactaceae | |
Thelocactus bicolor var. bicolor
| | | |
| Cactaceae | |
Thelocactus bicolor subsp. bolaensis
| (Runge) Doweld | | 1999 |
| Cactaceae | |
Thelocactus bicolor var. bolaensis
| (Runge) A. Berger | | 1929 |
| Cactaceae | |
Thelocactus bicolor subsp. flavidispinus
| (Backeb.) N.P. Taylor | Cactaceae Consensus Init. 5: 14 | 1998 |
| Cactaceae | |
Thelocactus bicolor var. flavidispinus
| Backeb. | Sukkulentenkunde 1941: 6, f. | 1941 |
| Cactaceae | |
Thelocactus bicolor var. pottsii
| (Salm-Dyck) Backeb. | Cactaceae Handb. Kakteen. 5: 2809 | 1961 |
| Cactaceae | |
Thelocactus bicolor var. schottii
| (Engelm.) Krainz | Kakteen (H. Krainz) 18: C VIIIb | 1961 |
| Cactaceae | |
Thelocactus bicolor subsp. schwarzii
| (Backeb.) N.P. Taylor | Cactaceae Consensus Init. 5: 14 | 1998 |