This blackberry-like fruit is named for the botanist who bred it
This particular potato variety was 
created by Burbank to help "revive the... [DOC] [TLE] Boysenberry - Wikipedia [PAR] The boysenberry /bznbri/ is a cross between the European Raspberry (
Rubus idaeus), a European blackberry (Rubus fruticosus), an American 
dewberry (Rubus aboriginum) and the Loganberry (Rubus  loganobaccus).