Tayberry

A tayberry is a cross between a blackberry and a red raspberry. The genetic cross was patented in 1979.
It is a cultivated shrub in the genus "Rubus" of the family Rosaceae. It was named after the River Tay in Scotland. The fruit is sweeter, much larger, and more aromatic than that of the loganberry. The loganberry is itself a blackberry and red raspberry cross.
The fruit do not pick easily by hand and cannot be machine harvested. They have not become a commercially grown berry crop. This plant has gained the Royal Horticultural Society's Award of Garden Merit.