All Species in Echinocactus
- Devilshead (Echinocactus horizonthalonius)
- Echinocactus horizonthalonius subsp. australis (Echinocactus horizonthalonius subsp. australis)
- Echinocactus horizonthalonius subsp. horizonthalonius (Echinocactus horizonthalonius subsp. horizonthalonius)
- Echinocactus platyacanthus (Echinocactus platyacanthus)
- Echinocactus × diabolicus (Echinocactus × diabolicus)