Thalictrum tuberosum

Perennial of the Ranunculaceae family, native to the Iberian Peninsula and southern France, where it is found in the Pyrenees and adjacent limestone massifs. It grows on dry rocky lawns, the edges of stony paths, and open limestone garrigues, between approximately 400 and 1,500 meters.

It forms small, light, and upright clumps, 20 to 40 cm in height, borne by slender stems from characteristic underground tubers, which give it its species name and allow it to endure dry periods. The foliage, glaucous and finely cut, resembles that of other thalictrums but in a more compact version.

Unlike most thalictrums, its flowers have true petaloid sepals, pure white, broad and well visible, surrounding a cluster of pale yellow stamens, giving it an appearance akin to an anemone or a small clematis. The flowers are gathered in loose and airy panicles.

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

In cultivation, it requires full sun, well-drained limestone soil, and some summer dryness, conditions opposite to other garden thalictrums. A singular and uncommon plant in collections.