True berries include grapes, cranberries and bananas but, confusingly, not raspberries, blackberries and strawberries! Blackberries and Raspberries are referred to as Aggregate Fruits and the tiny hairs on their outside are remnants of stigmas and styles…well, now you know!
Sad, I know, but I had a debate about berries recently and trawled the net to answer the questions. I can imagine some other geeky soul doing the same some time and finding this summary!