The occurrence of two plastid types (« normal » chloroplasts and abnormal plastids) in leaves of variegated mutants of Eurya, Cape pittosporum and star jasmine has been verified by light and electron microscopy. These mutants are interpreted as periclinal chimaeras (mesochimaeras of the GWG-type). In all the three plants examined abnormal plastids are irregularly shaped and devoid of any definite lamellar system, although a large number of vesicles and plastoglobuli occupy the electron-dense stroma.