In 2002, we stopped for lunch at a 7,500' elevation ski lodge in Argentina's Mendoza province just before reaching the base of Mt. Aconcagua. Growing in one of the flower beds was an unusual form of the Mexican Sedum palmeri that seemed to be a tetraploid. After 10 years of growing this sedum in our home garden, it's time to share, although we still don't know how a northern Mexican sedum made its way to Argentina. In 10 years, Sedum palmeri 'Mendoza' has made a compact 8" tall x 18" wide clump of fleshy glaucous-green rosettes in our bermed rock garden, topped in very early spring by short, arching spikes of bright yellow flowers.