Synonyms- Rapicactus pailanus, Turbinicarpus mandragora ssp pailanus.
Body- Solitary, flattened globular tapering below, 50mm high 60mm wide olive green.
Root- Bundled swollen.
Tubercles- Irregular pyramidal quadrangular or rhomboid to 5mm long, 4mm wide.
Spines- Radials- 11-16 white rigid to 10mm long.
Centrals- 2 one erect one horizontal to 25mm long.
Flowers- Funnel form yellowish with purplish midribs and lighter margins to 24mm wide.
Fruits- Urn shaped to 12mm long.
Distribution- Sierra de Paila in the state of Coahhuila (Mexico). Altitude 1900-2240m.
This species is not easy and can become too elongated if compost is too rich. It also has a tendency to loose its roots over winter. Requires full sun and careful watering to keep plant compact.