Sepal Patterning (IMAGE) California Institute of Technology Caption Scanning electron micrographs of an Arabidopsis sepal shows that the outer surface contains cells in a wide range of sizes from the highly elongated giant cells (falsely colored in red) to a variety of smaller cells. Credit Caltech/Adrienne Roeder Usage Restrictions With credit as given above. 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.