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Perennial of the Saxifragaceae family, belonging to the Ligulatae section, native to the Eastern Alps and northwestern Balkans, where it colonizes calcareous cliffs, sunny rocks, and wall crevices at about 1,000 to 2,500 meters.
It forms dense and flattened rosettes, gradually widening into a compact cushion. The leaves are narrowly spatulate to linear, medium green, and bear along their margins a very characteristic white calcareous concretion, deposited by the hydathodes* — it is precisely this pearly white border, visible along the entire length of the blade, that gave the species its name and distinguishes it immediately at first glance.
The erect flowering stems reach 15 to 25 cm and bear loose panicles of small white flowers with oval petals. In its natural habitat, its flowering extends from June to July. In cultivation, it generally blooms in June.
It requires a well-drained calcareous substrate, a sunny to semi-shaded exposure, and good aeration at the rosette level. It withstands winter cold well but fears excess stagnant moisture. An excellent candidate for rock gardens or alpine container gardens.
* Hydathodes are tiny pores located at the edges of the leaves. They excrete excess water absorbed by the plant, carrying with it dissolved mineral salts. As they dry, these deposits form small white calcareous incrustations that festoon the leaf margins and give the rosettes their characteristic frosted appearance.