Uebelmannia

Uebelmannia is a botanical genus of rare and highly valued cacti, endemic to the state of Minas Gerais, Brazil. They are slow-growing plants, cylindrical to globose in shape, with shiny skin and marked ribs, famous for their ornamental spines and for being threatened with extinction.
They have a cylindrical or spherical body that varies from light green to dark purple, often covered by a thin waxy layer.
They are native to the rocky fields of the Cerrado, growing in rocky areas and sandy soils at high altitudes.
They are considered true "jewels" in the world of succulents, facing a high risk of extinction in the wild due to the destruction of their habitat.