This charming miniature selection is said to be a cross of two cultivars of Sempervivum arachnoideum, ‘Albion’ and ‘Album’, both white flowered selections with lime green foliage, like this one. Our plants came from Uhlig’s nursery in Germany, which provides an illustration on its website of tightly packed rosettes with copious arachnoid wool stretched between the leaf tips. Since we acquired the plant in 2012, it has grown prolifically but never produced any wool. Perhaps this is unnecessary in the balmy climate of southern California, or, alternatively, we have been propagating a hairless sport. In either case, this one seems well worth growing. Divisions of HBG 136651. $7.