Pacific Yew Tree (IMAGE) Northwestern University Caption Taxol, the anti-cancer drug, is produced naturally in the bark of Pacific Yew trees, which take 80 years to grow. Credit National Cancer Institute 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.