Pediocactus horripilus Thelocactus horripilus Bravocactus horripilus Bravocactus horripilus subsp. wrobelianus Mammillaria horripila Neolloydia horripila Thelocactus goldii Echinocactus horripilus Echinocactus horripilus var. erectocentrus Gymnocactus horripilus subsp. kvetae Turbinicarpus horripilus subsp. kvetae Turbinicarpus horripilus var. wrobelianus Turbinicarpus horripilus subsp. wrobelianus Thelocactus horripilus Echinocactus caespititius Echinocactus horripilus Gymnocactus horripilus Turbinicarpus horripilus
World Flora Online, http://www.worldfloraonline.org/, accessed June 20, 2024