Thelocactus bicolor subsp. heterochromus (F.A.C.Weber) Mosco & Zanov. in Bradleya 18: 62. 2000
Thelocactus bicolor subsp. heterochromus in Bradleya 18: 62. 2000
is new combination for Echinocactus heterochromus in Bois, Dict. Hort.: 468. 1895
Thelocactus bicolor subsp. heterochromus in Bradleya 18: 62. 2000