flower Classified on the basis of location of Ovary
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the flowering plants, an ovary is a part of the female reproductive organ of the flower or gynoecium. Specifically, it is the part of the pistil which holds the ovule(s) and is located above or below or at the point of connection with the base of the petals and sepals. The pistil may be made up of one carpel or of several fused carpels (e.g. dicarpel or tricarpel), and therefore the ovary can contain part of one carpel or parts of several fused carpels. Above the ovary is the style and the stigma, which is where the pollen lands and germinates to grow down through the style to the ovary, and, for each individual pollen grain, to fertilize one individual ovule. Some wind pollinated flowers have much reduced and modified ovaries.
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Flowers are classified in three categories on the basis of location of ovary. In hypogynous flowers the ovary occupies the highest position and in perigynous flowers ovary is situated in the centre. If ovary is located below the other parts of flower,then the flower is said to be epigynous.