WEBBII
Reto Nyffeler wrote in the Ilustrated Handbook of Succulent Plants, 2003 : The following name is of unresolved application but is referred to this genus : Aeonium webbii Bolle (1859).
The article linked below discusses a hypothesis which cannot be proved :
La vera identità di Aeonium webbii Bolle / La vraie identité de Aeonium webbii Bolle