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A sterile pistil or gynoecium or ovary is known as pistillode.

Flower is defined as a highly condensed and modified reproductive shoot system or it can also be defined as modified shoot where in the shoot apical meristem changes to floral meristem their internodes do not elongate and the axis get condensed. Calyx, corolla, androecium and gynoecium represent four whorls of sterile and fertile leaves borne at different nodes. A sterile pistil or gynoecium or ovary is known as pistillode. Example: Gall flower of hypanthodium.

Carpels are composed of the stigma, style and ovary, the female parts of a flower. Flowers can have one or more carpels. It can also be defined as the fourth whorl of the flower present in the center.

The word pistil is derived from the latin term pistillum, pestle. It can either be the same as an individual carpel as it comprises stigma, style, ovary or a carpels fused together. This means a pistil can have lots of carpels.

Carpels are composed of the stigma, style and ovary, the female parts of a flower. Flowers can have one or more carpels. It can also be defined as the fourth whorl of the flower present in the center.

The word pistil is derived from the latin term pistillum, pestle. It can either be the same as an individual carpel as it comprises stigma, style, ovary or a carpels fused together. This means a pistil can have lots of carpels.

Gynoecium constitutes the inner essential whorl of flowers comprising carpels. Carpel is the unit of gynoecium and it is distinguishable into basal ovule bearing region, terminal pollen receiving region(stigma), joined by stalk-like structure (style). The number of carpel is usually fixed for a plant species and it is described as monocarpellary, bicarpellary, tricarpellary, tetracarpellary, pentacarpellary or multicarpillary.

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Carpel is the female part of the flower consisting of stigma, style and ovary.

Pistil can be either the same as an individual carpel or a collection of carpels fused together.

Made up of stigma, style and ovary.

Their number can be counted, by counting the number of separate carpel.

Their number can be counted by counting the number of separate ovaries in the flower.

They function mainly by producing eggs.

Egg production is absent in pistil.

Their main function is dispersal of seed.

They work as the female reproductive part of flowers.