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Thelocactus bicolor (Galeotti ex Pfeiff.) Britton & Rose in Bull. Torrey Bot. Club 49: 251. 1922
Thelocactus bicolor subsp. flavidispinus (Backeb.) N.P.Taylor in Cactaceae Consensus Init. 5: 14. 1998
Thelocactus bicolor subsp. schwarzii (Backeb.) N.P.Taylor in Cactaceae Consensus Init. 5: 14. 1998
Thelocactus bicolor subsp. swobodae Halda & Horáček in Acta Mus. Richnov., Sect. Nat., 9: 73. 2002
Thelocactus bicolor subsp. zwakii Chvastek & Halda in Acta Mus. Richnov., Sect. Nat., 7: 38. 2000
Thelocactus bicolor var. commodus R.Haas in Kakteen And. Sukk. 39: 87. 1988
Thelocactus bicolor var. flavidispinus Backeb. in Jahrb. Deutsch. Kakteen-Ges. 1: 6. 1941