Synonyms- Echinocactus subterraneus, Thelocactus subterraneus, Rapicactus subterraneus, Gymnocactus subterraneus, Neolloydia subterraneus, Pediocactus subterraneus.
Body- Usually solitary, globular cylindrical with elongated slender neck, 150mm high, 30mm wide green-bluish.
Tubercles- Pyramidal conical 3-5mm high.
Spines- Radials- 16-19 radiating straight glassy white 2-6mm long.
Centrals- 2 straight erect blackish-grey 20-23mm long.
Flowers- Magenta with pink-brown midstripe 20-25mm long, 30mm wide.
Distribution- Very wide distribution in the municipalities of Aramberri, Doctor Arroyo and Mier y Noriega in the state of Nuevo Leon (Mexico).
Fairly easy species to cultivate. Requires strong sun and careful watering to keep plant compact and not to become elongated and unnatural in appearance.
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