Time for discussion on the three entries for S. erythraeum / S. marmoreum subsp. erythraeum.
http://garden.org/plants/searc...
This is the correct plant for the name S. marmoreum subsp. erythraeum with the synonym name of S. erythraeum.
My plant came from North Hills Nursery. It would be helpful to find out where each of you obtained your plants.
This plant came from Simply Succulents, and is incorrect.