The plant family Didiereaceae Radlk. was named and described by Ludwig Adolph Timotheus Radlkofer in Naturlichen Pflanzenfamilien in 1896.
As of 12-20-22 when this page was last updated, Plants of the World Online by Kew lists 6 accepted genera in this family of flowering plants.
The only species I have experience with are Portulacaria afra and Portulacaria afra ‘Variegata’.
For more information about this family of plants, please click on the links below. The links take you directly to the information about the family.
PLANTS OF THE WORLD ONLINE