A fruit-like structure that has developed from the ‘free’ carpels of a single flower and is composed of a number of separate fruits.
The Blackberry is the fruit of the Rubus genus. It is an ‘Aggregate’ fruit because it is made up of a number of drupelets (small drupes). The first photo shows a single blackberry. Each blackberry is made up of a number of druplets formed from the individual carpels at the centre of a single flower. The second photo shows the fruit of a Clematis vitalba Travellers Rest. The fruit is an aggregate of achenes. The third photo shows the fruit of a Delphinium which is an aggregate of follicles.