It is close to impossible to come up with a firm ID for most random Aeoniums in cultivation, especially without observing the plant over the course of a season and seeing its flowers. I grow a couple dozen maybe and have proper names for only a handful.
Three things to bear in mind with Aeonium ID. First, they change dramatically over the course of their cycle of growth and rest, so any one plant will look different depending on the time of year (not to mention the exposure it is receiving). Second, they hybridize quite freely (and have self-seeded in my container garden), and many of the plants in cultivation are hybrids not species. Third, plants for sale are often dominated by named cultivars (eg. Zwartkop, Sunburst) rather than species.
