- cultivated hybrid bramble of California having large dark wine-red fruit with a flavor resembling raspberries
- large raspberry-flavored fruit; cross between blackberries and raspberries
- A boysenberry is a cross between a European Raspberry (Rubus idaeus), a Common Blackberry (Rubus fruticosus), and a Loganberry (Rubus × loganobaccus). It is a large compound fruit, with large seeds and a deep maroon color.
- (Boysenberries) Around 1935, Walter Knott of Knotts Berry Farm in Buena Park and Anaheim Parks Superintendent Rudolph Boysen experimented with a new strain of berry, but the plants kept dying on the vine. ...
- Berry that can have potent antioxidant properties (Source: Journal of Agricultural Food Chemistry, June 5, 2002, pages 3495–3500).