Loblolly Pines (IMAGE) University of California - Davis Caption The loblolly pine -- whose genome is the largest ever sequenced -- is the most commercially important tree species in the United States and the source of most American paper products. Credit Ron Billings/Texas A&M Forest Service 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.