1.The upper part of thalamus may be disc shaped, cup-shaped or flask-shaped.
2.Calyx, corolla and androecium arise from around the ovary and not beneath it.
3.Ovary is half-superior/half-inferior.
4.The ovary is placed at the bottom of cup or flask-shaped thalamus. Ovary wall is not fused with the thalamus.
5.Calyx, corolla and androecium often develop from a common base. The ovary of gynoecium may or may not be visible from outside.