LeBuhn Potter Plants (IMAGE) San Francisco State University Caption These are tomato plants, with bags placed over some floral clusters to prevent bees from visiting and other floral clusters left open to the air. Credit Drew Potter 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.