può essere la crassula ovata "Hummel's sunset"secondo te?
http://www.google.it/images?q=Crassula+ovata+%27Hummel%27s+Sunset%27&um=1&ie=UTF-8&source=og&sa=N&hl=it&tab=wi&biw=853&bih=397
http://www.google.it/images?q=Crassula+ovata+%27Hummel%27s+Sunset%27&um=1&ie=UTF-8&source=og&sa=N&hl=it&tab=wi&biw=853&bih=397