The role of stamens is to undertake the reproduction of flowering plants. Stamens are divided into pistils and stamens. Stamens are deformed leaves, which consist of pistils and filaments (whiskers). The flower heart on the silk is connected under the head, which looks like a grain of rice. The pistil consists of one or more carpels, and each carpel is a deformed leaf. Morphologically, pistil consists of stigma, style and ovary. The seeds of flowering plants are developed from the ovules of pistil ovary.
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The basic unit of pistil is carpel, and each carpel is a deformed leaf. Pistil can be formed by a single carpel or by combining two or more carpels. The former is called single carpel and the latter is called compound carpel. Single pistil is divided into single carpel single pistil and free carpel single pistil The difference between them is that a single carpel and a single pistil are flowers with only one carpel and one pistil, and this pistil is formed by this carpel.
A single pistil with carpels is a flower with multiple carpels and pistils, but each pistil consists of only one carpel. Finally, all the pistils in this flower are collectively called single pistil, with carpels. Usually, the ovary of the pistil develops into fruit, and the ovules in the ovary develop into seeds. This kind of fruit developed from ovary is called true fruit. If the receptacle heals with the ovary, it will eventually participate in the fruit formation, which is called false fruit (the fruit is not only formed by the ovary, but also calyx, corolla and inflorescence axis can participate in the fruit formation).