Dudleya “White Sprite” looks like a D. attenuata cultivar. Let me look it up. Nope. It’s either from Dudleya gnoma or Dudleya greenii.
It’s from the Santa Barbara area and the rosettes only get to about 4″ across. We find that it will produce lots of tightly packed rosettes in a year. A lot more than our D. greenii’s ever have. Of course, by a lot for a Dudleya I mean 2 to 4.