Blackberry and Boysenberry belongs to the same family and class. Boysenberries are considered to be a cross section between blackberry, raspberry, and loganberry. On the other hand, Blackberries are considered genuine berries, which are smaller and sweeter than boysenberries.
How were boysenberries created?
A family friend, Anaheim Parks Superintendent Rudolph Boysen, had experimented with a new strain of berry, but the plants kept dying on the vine. Walter took the scraggly plants, nurtured them to health and named the new berry—a cross between a raspberry, a loganberry and a blackberry—”boysenberry,” after his friend.