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Perennial of the Brassicaceae family, found in the mountain ranges of Central and Southern Europe, from the Alps to the Carpathians and the Balkans, on calcareous rocks, screes, and well-drained alpine grasslands.
As its name suggests, it has creeping or prostrate-ascending stems, forming low and spreading carpets of 10-20 cm, with grayish leaves and dense stellate indumentum. The flowers are yellow, gathered in corymbose clusters in spring. It is close to A. montanum and some authors treat it as a subspecies or variety of it; it is mainly distinguished by its more clearly creeping habit and slightly different silicles.
In cultivation, it is suitable for the same uses as other rock garden alyssums: calcareous or neutral substrate, perfect drainage, full sun. Its spreading habit makes it an interesting plant for covering small areas in rock gardens or spilling over walls.