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The Geohintonia cactus genus only contains a single species, Geohintonia mexicana, discovered in 1991 by G. S. Hinton. It is a solitary, globular shaped cactus. Flowers are deep pink to purple. It is found in the same habitat as Aztekium species on steep cliffs on a gypsum based mineral soil in Mexico (Nuevo Leon). Cultivation must be done on a 100% mineral soil with perfect drainage. Propagation is done from seeds and grafting seedlings. Minimum temperatures should be around 10 °C in winter.