The tendency of cohesion of stamen results in diadelphous condition. In perigynous flowers, a hypanthium (a floral tube formed from the fusion of the stamens, petals, and sepals) is attached to the receptacle below the gynoecium and surrounds the ovary; the ovary is superior, and the free parts of the petals, sepals, and stamens are attached to the rim of the hypanthium. Perigynous flower and diadelphous condition are found in the family Papilionaceae.