BOYSENBERRY - RUBUS URSINUS x RUBUS IDAEUS (TUT)

The boysenberry is a cross among the European raspberry (Rubus idaeus), European blackberry (Rubus fruticosus), American dewberry (Rubus aboriginum), and loganberry (Rubus × loganobaccus).

It is a large 8.0-gram (0.28 oz) aggregate fruit, with large seeds and a deep maroon color. (source: Wkipedia)