Name: form the Aztec people, resemblance with certain Aztec sculptures.
Genus: 3 species.
Region: Mexico.
Botany: small globular cactus, 2 cm wide, with 9 to 11 ribs, with typical transverse wrinkles, pale green to grayish-green, with much white wool; flowers small, white petals, pinkish sepals; fruits small, pinkish, berry-like.