Spinach in greenhouse.3 (IMAGE) Boyce Thompson Institute Caption A cultivated variety of spinach grows in a greenhouse at Shanghai Normal University. Credit Image credit: Xiaofeng Cai. Usage Restrictions must use proper credit. License Original 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.