Aggregate fruit

An aggregate fruit, or etaerio, develops from a flower with many simple pistils. An exemplar is the raspberry, whose simple fruits are termed drupelets as each is like a small drupe attached to the receptacle. In few bramble fruits (such as blackberry) the receptacle is extended and part of the ripe fruit, making the blackberry an aggregate-accessory fruit. The strawberry is as well an aggregate-accessory fruit, only one in which the seeds are limited in achenes. In all these examples, the fruit develops from a single flower with many pistils.