Aggregate fruit

An aggregate fruit, or etaerio, develops from a flower with numerous easy pistils. An example is the raspberry, whose simple fruits are termed drupelets since each is like a small drupe emotionally involved to the receptacle. In some bramble fruits (such as blackberry) the vessel is elongated and part of the ripe fruit, making the blackberry an aggregate-accessory fruit. The strawberry is also an aggregate-accessory fruit, only one in which the seeds are enclosed in achenes. In all these examples, the fruit develops from a single flower with several pistils.