A subspecies of the Caryophyllaceae family, Dianthus gratianopolitanus ssp. pulchellus is a dwarf pink of the southwestern Alps, found notably in the massifs of Haute-Provence and the Maritime Alps, where it occupies rocks, scree, and dry grasslands on limestone or mixed substrates, at altitudes of approximately 1,200 to 2,200 meters.
Its most striking feature is its hemispherical cushion shape, perfectly rounded, extremely dense and compact, with tiny, linear, glaucous green to medium green leaves, giving the plant outside of flowering the appearance of a compact and regular vegetal ball, almost architectural, set among the rocks. This dome structure is one of the most remarkable of the genus in Europe.
The flowers, borne on very short barely emerging stems, are soft pink to pale lilac pink, with petals that are little or not fringed, almost entire, which clearly distinguishes them from other subspecies of gratianopolitanus with more pronounced fringes. Their simplicity and delicacy contrast with the density of the cushion.
In its natural habitat, its flowering extends from June to August depending on altitude. In cultivation, it generally occurs in June-July.
A species for discerning collectors, it requires impeccable drainage, a poor and stony mineral substrate, full sun exposure, and protection against any stagnant moisture in winter. Cultivation in a trough or very well-drained rock garden suits it perfectly.