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Perennial of the Campanulaceae family, native to the Carpathians, where it colonizes rocks, limestone scree, and stony slopes, generally between 500 and 1,800 meters. Its natural range mainly covers Slovakia, southern Poland, Romania, and western Ukraine.
It forms low and spreading clumps, 15 to 30 cm in height, with a slightly bushy habit. The leaves are oval to heart-shaped, distinctly toothed, a bright and fresh green, borne on well-marked petioles for the basal leaves, shorter and sessile towards the top of the stems.
The flowers, upright and solitary at the top of slender stems, are broadly open cup-shaped, almost flat, from blue-violet to lavender blue depending on the individuals, with clearly visible stamens in the center. This flared shape, atypical in the genus, is one of the most immediately recognizable features of the species. White forms also exist.
In its natural habitat, its flowering extends from July to September. In cultivation, it generally blooms from June to August, with a possible resurgence if faded flowers are removed.
It adapts to most well-drained soils, neutral to calcareous, in full sun or light partial shade. Very accommodating and robust, it is among the most cultivated bellflowers for rock gardens, borders, and walls.