Author 'Mimi' : CORETE of Japan (Kerria japonica) is a shrub of easy culture that is now very widespread in the gardens in temperes climates and offers abundant yellow flowering in the spring (flower has 5 petaloidal for the type species) he y'a also the variety double flowers as of the PomPoms to the petaloidal second-hand is multiplied by horticulturalists (cultivar).