Dyckia mauriziae, this gives a new meaning to the word rare.

 Dyckia mauriziae

Ok,it is in very bad conditions but it is alive and here with me.
Dyckia mauriziae is a white distic already described super ultra rare Brazilian Dyckia.
It lives in a ravine like formation covered by fallen leaves of the Brazilian Cerrado.

The leaves are formed in a fanned disposition and they are covered by large white scales.

Here just a timid porr cared plant but it will improve.