Sedum cauticola

Sedum cauticola, Cliff-Dwelling Stonecrop, is native to Japan and makes a tough, hardy, drought-tolerant ground-cover that is ideal for dry gravel gardens, rockeries, stonewalls and roof gardens. It has a vigorous habit, attractive blue-grey foliage and showy pink flowers in the late summer to early autumn. It is herbaceous and dies down in late autumn to reappear in the spring.

Sedum cauticola is still a taxonomically unresolved name. The much talked about transferance to the genus Hylotelephium is not universally accepted. The plant is sometimes encountered by its synonym, Hylotelephium cauticola. There is also a cultivar going by the ghastly name 'Coca Cola', I can't discern any difference between it and the type species and I presume it's just another gimmicky marketing exercise dreamt up to flog more plants.