1. The upper part of thalamus is slightly swollen and forms a cushion like disc.
2. Calyx, corolla and androecium arise below the level of ovary.
3. Ovary is superior while all other floral parts are inferior.
4. The gynoecium is placed at the top of the thalamus. The wall of ovary is not fused with the thalamus.
5. Calyx, corolla and androecium remain separated from the gynoecium so that the ovary is visible from outside.