Galls Forming on Leaves (IMAGE) Cell Press Caption This photograph shows the galls formed on the undersides of leaves, a region of the tree to which the love vine does not attach unless galls are present. Credit Scott Egan & Matt Comerford Usage Restrictions Credit Required License Licensed 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.