Sempervivum arachnoideum var. tomentosum 'Cobweb Buttons'
2-3" wide rosettes covered with a dense webbing of gray thread over light green leaves. Sends up a spike of star shaped pink or purple flowers once a season. Native to the Pyrenees and Carpathian Mountains of Europe. For a rock garden or pocket in a stone wall. Dry, well drained soil. Zones 3-8.