Sclerocactus cloverae subsp. brackii Pediocactus cloverae Sclerocactus whipplei var. reevesii Pediocactus cloverae subsp. brackii Sclerocactus whipplei subsp. cloverae Sclerocactus whipplei subvar. aztecia
Taxonomic data from World Flora Online, accessed June 20, 2024