Perennial of the Campanulaceae family, endemic to northern Italy, mainly the Lombard Prealps and adjacent valleys, where it colonizes limestone cliffs, old walls, and shaded to semi-shaded rocky crevices, at altitudes generally between 200 and 1,000 meters.
It forms loose and trailing clumps, 20 to 40 cm in height, with flexible and branched stems that willingly cascade over rocky walls. The leaves are oval to heart-shaped, crenate, bright green, and pubescent, giving them a soft texture.
The flowers, star-shaped and widely open, ranging from medium lilac to pale violet, are borne in dense and upright spikes, generously adorning the stems along their entire length. The prominent stamens with brown-orange anthers are a distinctive and ornamental detail, clearly noticeable on plants in full bloom.
In its natural habitat, its flowering extends from June to August. In cultivation, it generally occurs from June to July.
It requires a limestone soil, very well-drained, in a sunny to semi-shaded exposure. Particularly suited to cultivation in dry stone walls, vertical rock crevices, or in elevated pots allowing the stems to trail freely.