Ranunculus alpestris

A perennial of the Ranunculaceae family, Ranunculus alpestris is a species of the mountains of central and southern Europe, found in the Alps, the Pyrenees, the Apennines, and the Carpathians. It colonizes stabilized calcareous screes, rock crevices, snow hollows, and rocky alpine grasslands, generally between 1,500 and 3,000 meters.

It forms small, low, dense tufts, reaching 5 to 15 cm in height. The basal leaves are kidney-shaped to orbicular, deeply trilobed to multifid, a shiny and glossy green, leathery, borne on slender petioles. This dark, varnished foliage, very dense, provides a remarkable backdrop for the flowers.

The flowers, borne individually on slender stems, are pure and immaculate white, with five broadly oval and slightly overlapping petals, with a center of pale yellow stamens. In its natural habitat, its flowering extends from June to August depending on altitude, often as soon as the snow melts. In cultivation, it generally blooms in May-June.

The bright whiteness of the flowers above dark, glossy green foliage, in a context of gray rocks, is one of the sharpest and purest spectacles one can encounter in high calcareous mountains.

In cultivation, it requires perfect drainage, a rocky calcareous substrate, a cool to semi-shaded exposure, and moderate humidity in summer. It is grown in alpine rock gardens or alpine troughs.