Umbilicus rupestris

Succulent perennial of the Crassulaceae family, widespread in western and southern Europe, from Portugal and the British Isles to the Mediterranean basin, as well as in North Africa and Western Asia. It colonizes old walls, rock crevices, shaded embankments, and dry stone hedges, from sea level to moderate altitudes.

The plant forms a basal rosette of fleshy, round to kidney-shaped leaves with a crenate edge, from glaucous green to medium green, bearing in their center a characteristic umbilical depression that gave the genus its name. This central dimple, clearly visible on adult leaves, is one of the most immediate signs to identify the species.

At the time of flowering, upright and slender stems rise to 15–30 cm, bearing long dense clusters of small drooping tubular flowers, greenish-white to pale cream, arranged in narrow and regular spikes that contrast sharply with the low and spreading foliage. The floral stems are reddish-brown at the base.

In its natural habitat, its flowering extends from May to July.

It accommodates partial to fairly dense shade, in well-drained soil, or even in simple masonry crevices where it establishes itself spontaneously. It tolerates some summer drought thanks to its fleshy leaves. Hardy in much of Western Europe, it reseeds easily and can form lasting colonies on old walls.