Which of the following is not a floral character of the family Fabaceae?
1. Calyx - Sepals five, gamosepalous; imbricate aestivation
2. Corolla - Petals five, polypetalous; vexillary aestivation
3. Andreoecium - Ten, diadelphous, anther dithecous
4. Gynoecium - Ovary inferior, bicarpellary, unilocular with many ovules