Madagascar Periwinkle (IMAGE) John Innes Centre Caption Breakthrough research has unraveled the complex chemistry of Madagascar periwinkle. the plant produces the cancer-fighting compound vinblastine. Credit Andrew Davis - John Innes Centre 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.