Perennial of the Saxifragaceae family, Saxifraga cotyledon is a species of the European mountains, present in the Alps, the Pyrenees, the Apennines, and Scandinavia, where it colonizes siliceous cliffs and rocky walls, between approximately 500 and 2,000 meters. The variety pyramidalis is distinguished by a particularly ample and strictly pyramidal inflorescence, considered the most spectacular of the group.
The plant forms large flattened rosettes, reaching 15 to 20 cm in diameter, with dark green, leathery, spatulate leaves edged with a fine white border of calcareous deposits from the hydathodes. These rosettes are monocarpic, each rosette dying after flowering, but the plant perpetuates itself through the daughter rosettes produced laterally.
The robust flowering stem can rise to 40–60 cm and bears a very branched pyramidal panicle, densely covered with hundreds of small cream white flowers, sometimes very slightly speckled. The overall effect is striking, of rare amplitude in the genus.
In its natural habitat, its flowering extends from June to July. In cultivation, it generally occurs in May-June.
It thrives in well-drained siliceous substrate, in sunny to semi-shaded exposure, and tolerates fairly dry conditions once established. It is perfectly suited for large walls and rock gardens.