Genus of about 30 species of evergreen, perennial, ocasionally biennial succulents, often subshrubby, from hillsides in Madeira, the Canary Islands, Cape Verde Islands, N, Africa, and the Mediterranean. The Aeoniums bear rosettes of leaves ranging in colour from yellow to almost black. The rosettes may be flat saucers of dencely-packed leaves or a looser arrangement on top of brunched stems.