cross between a European Raspberry (Rubus idaeus), a Common Blackberry (Rubus fruticosus), an American Dewberry (Rubus aboriginum) and a Loganberry (Rubus × loganobaccus)
The boysenberry is a cross between the European raspberry, European blackberry, American dewberry, and loganberry .
It is a large 8.0-gram (0.28 oz) aggregate fruit, with large seeds and a deep maroon color.