The olallieberry (pronounced oh-la-leh, sometimes spelled ollalieberry, olallaberry, olalliberry, ollalaberry or ollaliberry) is the marketing name for the 'Olallie' blackberry released by the USDA-ARS (in collaboration with Ore. St. University) that was a selection from a cross between the 'Black Logan' (syn. 'Mammoth'), developed by Judge James Logan in California, and the youngberry, which was developed by Byrnes M. Young in Louisiana. According to Logan, 'Black Logan' was from a cross between the eastern blackberry 'Crandall' and the western dewberry 'Aughinbaugh'. 'Youngberry' was from a cross of 'Phenomenal' x 'Austin Mayes'. 'Phenomenal' in turn is a cross of the 'Aughinbaugh' western dewberry and 'Cuthbert' red raspberry and so has a very similar background to Logan's 'Loganberry' and shares a parent with his 'Black Logan'.