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Key Differences Between Hypogynous and Epigynous Flower. Hypogynous flower comprises a superior ovary, where all the floral whorls originate from the thalamus, under the gynoecium. On the other hand, the epigynous flower contains an inferior ovary, where all the floral whorls originate upwards the thalamus, above the gynoecium.
Epigynous flowers refers to the flowers having the floral parts such as the petals and stamens attached to or near the upper part of the ovary. Hypogenous flowers have a superior ovary. Ovary is superior, other parts are inferior.
Epigynous: In the epigynous flowers, ovary is present inferior to calyx, corolla and androecium. The thalamus in this encloses the ovary inside it & the other three whorls are located above this, e.g., daffodil, cucumber, etc.
Inferior Ovary (Epigynous Flowers) In the opposite situation, the other floral whorls join at a point above the ovary. In this case, the ovary is inferior and the flower is epigynous (on top of the gynoecium).
Examples of epigynous flowers (and their fruit) include pear (pome), narcissus (loculicidal capsule), and those in the Asteraceae, aster, daisy, composite, or sunflower family, (cypsela).
Epigynous flowers Other flower parts are attached ABOVE the ovary. This is called an inferior ovary because the gynoecium node isn’t positioned right at the tip of the receptacle, but rather is sunken down into the receptacle below where the androecium, calyx, and corolla are attached.
In epigynous flowers, the hypanthium is fused to the gynoecium, and the free parts of the sepals, petals, and stamens appear to be attached to the top of the gynoecium, as in the apple (Malus; Rosaceae); the ovary is inferior, and the petals, sepals, and stamens…
Hypogynous and epigynous flower are two types of flowers classified based on the level of the ovary. Both flowers contain sepals (calyx), petals (corolla), stamens, and pistils. Also, they produce an androperianth by fusing the androecium and perianth (calyx and corolla) together.
Epigynous flower is a flower with the floral parts such as the petals and stamens attached to or near the upper part of the ovary. In other words, the hypanthium is fused to the gynoecium and the free parts of the sepals, petals and stamens appear to be attached to the top of the gynoecium.
Epigynous Flower: The cup-shaped thalamus grows upwards and fuses with the wall of the ovary and bears sepals, petals, and stamens on the top of the ovary. Such a flower is called Epigynous .