A flower of Axinaea Affinis (image) Cell Press Caption A flower of Axinaea affinis. The strong visual colour contrast between the yellow, bulbous stamen appendages (bellows organs) and the pink petals becomes clear. The pollen is contained in the anthers, the blackish, elongated structures connected to the bulbous appendages. Credit Current Biology, Dellinger et al. Usage Restrictions Credit Required 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.