Arabidopsis (IMAGE) University of Zurich Caption Due to epigenetic variation, the selected Arabidopsis plants flower later - recognizable by the shorter flower stems compared to the original population. Credit Image: UZH Usage Restrictions None 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.