Halved Savoy cabbage head (IMAGE) Eötvös Loránd University Caption Halved Savoy cabbage heads showing the different leaf layers and their colour change, as well as the central stem on which the leaves are developing. Credit Photo: Katalin Solymosi Usage Restrictions Credit must be given License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.