It's a Berry

Robert and I had lunch at Coco’s one day and he asked me what a boysenberry was. I replied, “It’s a berry.” While the answer was absolutely valid, he went on a five minute tirade about how I did not “answer the question.” Anyway, here’s a more detailed answer to Robert’s question, thanks to Wikipedia:

A boysenberry is a cross among a blackberry, red raspberry and loganberry. It was created by Rudolph Boysen, and first commercially cultivated by Walter Knott.