What is a loganberry a hybrid of?
It is a cross between the raspberry and an American Blackberry. Wikipedia has an article: “The loganberry is generally thought to be derived from a cross between the European red raspberry cultivar ‘Red Antwerp’ and the American blackberry cultivar ‘Aughinburgh’. It was accidentally created in 1880 or 1881 in Santa Cruz, California, by the American lawyer and horticulturist James Harvey Logan (1841-1928). In the 1880s, berry growers began to cross varieties to obtain better commercial varieties. Logan was unsatisfied with the existing varieties of blackberries and tried to cross two varieties of blackberries to produce a superior cultivar.” it continues here: http://en.wikipedia.