Forest Schematic (IMAGE) Penn State Caption Extended leaf phenology becomes apparent at the ends of the growing season -- in early spring and late fall -- when most native woody species have lost their foliage Credit Erynn Maynard-Bean, Penn State Usage Restrictions non commercial use only 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.