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An aggregate fruit is a type of fruit that develops from a single flower containing multiple pistils, which are the female reproductive parts of a flower. Each pistil can develop into a small fruitlet, and when these fruitlets are clustered together on the same flower, they form an aggregate fruit. Examples include blackberries and raspberries, which are technically aggregates of tiny drupes.12

In contrast, a multiple fruit develops from the fused ovaries of several flowers that are part of the same inflorescence (flower cluster). Examples of multiple fruits include the pineapple and mulberry.1

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2 Britannica Sources
  1. fruit - Types of fruits
  2. drupe

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