boysenberry plant
A boysenberry is a cross between a European Raspberry (*Rubus idaeus*), a Common Blackberry (*Rubus fruticosus*), and a Loganberry (*Rubus × loganobaccus*) .
Rubus loganobaccus L. H. Bailey
WIKIPEDIA:Boysenberry
rubus hybr.
rubus loganobaccus x laciniatus x idaeus
rubus ursinus var. loganobaccus cv. boysen
blackberry plant
requires discussion