Small solitary cactus that does not exceed the 10 cm of diameter, of a beautiful dark green, formed by little marked ribs and arranged slightly spirally. The variegated shape presents the typical lighter areas in the exact points where the chlorophyll is absent: these characteristics will never be the same from one plant to another, therefore each exemplar will be absolutely unique! It has very close and extremely woolly areoles, which with their white create a strong and pleasant contrast with the stem. From the areoles come out short and straight radial spines, arranged like a ray and of yellowish-brown color, and dark central spines more robust and longer. Between spring and summer the charm of this plant will be amplified by its large flowers, really peculiar: they have straw yellow petals, thin and extremely shiny like silk, adorned sometimes by slight reddish shades on the tips, so beautiful and showy to be able to enchant even the eyes less attentive!