Aeonium rosettes resemble big, fleshy-petalled daisies. Colors include green, yellow and garnet. Leaves of Aeonium 'Sunburst' are striped with yellow or cream. Aeonium 'Zwartkop', another show-stopper, is magenta-black.
There exist many aeonium hybrids. Some species are shrub-forming; all produce rosettes at the tips of ever-lengthening stems.
Aeoniums, mainly from the Canary Islands, thrive in mild, dry climates. Give them the same care as other soft-leaved succulents (as explained in my books and on this site's Succulent Care Basics page). Most can't handle freezing temperatures or desert heat.
Aeoniums are on my list of succulents for coastal Southern CA gardens. Farther inland, protect them from harsh midday sun and grow them as understory plants in bright or dappled shade.
When aeoniums get leggy, cut off the tops leaving an inch or two of stem and throw the rest of the plant away, roots and all. Replant the head as a cutting.
Aeoniums are monocarpic, meaning they die after blooming. But most aeoniums form branching shrubs, and not all the rosettes in a shrub flower at once, so you don't lose the entire plant. Aeonium blooms make long-lasting cut flowers.
I've identified and labeled photos for you according to genus and species, and common name if available. If you think I've ID'd any incorrectly, I definitely want to know. Please leave a comment or email me. — Debra Lee Baldwin
Aeoniums For Your Garden (3:16)
Debra's Dozen Easy-Grow Succulents, from Aeonium to Zebra Plant. A must-read for beginners trying to make sense of succulents. Discover lovely, readily available varieties anyone can grow.