Perennial of the Campanulaceae family, native to Greece and western Turkey, where it grows in the crevices of calcareous rocks and rocky scree, at medium to high altitudes.
It forms dense and compact cushions, highly branched, 5 to 15 cm in height, with a spreading and carpeting habit that allows it to naturally insinuate itself between stones. The leaves are small, oval, slightly crenate, dark green and glossy, close together on slender and highly branched stems.
The flowers, abundantly borne over the entire cushion, are widely open bell-shaped, pure white with a slight pink tint on the still closed buds, as the photograph perfectly illustrates. Their size, generous compared to the plant's size, and their remarkable density at full bloom give the tuft an appearance entirely covered in white.
In its natural habitat, its flowering extends from June to August. In cultivation, it generally blooms from May to July.
It requires very well-drained soil, preferably calcareous, dry in summer, in full sun exposure. It is perfectly suited to cultivation in rock gardens, alpine troughs, or between the stones of a wall. It tolerates summer drought well once established.