The Youngberry was another major breeding line used in many of our cultivated varieties. It was developed in Morgan City, Louisiana by B.M. Young in 1905. The Youngberry is a hybrid between the Phenomenal (a cultivar very similar to the Logan) and the Mayes Dewberry or trailing blackberry. It was not introduced until 1926, but it quickly became important in replacing the Logan to a great extent in California and to some extent in Oregon and Washington.