Flowers from the Middle Eocene of Eckfeld (IMAGE) Cell Press Caption This figure shows the diversity of flowers from the middle Eocene of Eckfeld: A. Sympetalous flower (dorsoventral) with calyx and tubular corolla. B. Pentamerous flower with club-shaped petals and filaments conspicuously tapering towards anthers. C. Persistent calyx of a pentamerous flower. D. Flower with conspicuous androecium. E. Flower with conspicuous androecium and valvate anthers. Credit Courtesy of Engel and Wappler Usage Restrictions Credit Required. 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.