I have to agree with Justin that this looks like the plant on glasshouseworks named Kalanchoe Mortagei Crenata.
Kalanchoe crenata is accepted but in review... could it be the same species as Kalanchoe mortagei which is accepted on the Plant List? Given a history of taxonomic confusion it's possible, both species names could be listed with sellers due to an uncertainty.
http://www.theplantlist.org/tp...
http://www.theplantlist.org/tp...
In any case, the species should be given in lower case, many use a capital which should be used for cultivars so leads to confusion.
There's a photo of Kalanchoe mortagei on DG (if you can access that Dave!) in an article by palmbob ..
More photos ..
http://public.fotki.com/yales/...
http://www.huntingtonbotanical...
http://www.infojardin.com/foro...
