Mammillaria orcuttii (Cactus)

It's a cactacea with a perfectly geometric globular shape, depressed at the apex. Its dark green body is characterized by small rhomboid tubercles, which are even more highlighted by the white down, resting only on the upper part of each protrusion, as if it were snowed. The central spines are short, black and straight, quite sparse; the radial ones are white and arranged in a star shape.