MARIONBERRY, Marionberry is a cultivar of blackberry developed by the USDA ARS breeding program in cooperation with Oregon State University. A cross between the 'Chehalem' and 'Olallie' varieties, it is the most common form of blackberry cultivated. It accounts for over half of all blackberries produced in Oregon. Marion blackberries, sometimes referred to as the “Cabernet of Blackberries,” are the premier blackberry cultivated and used in everything from yogurt, jam, baked goods and juices. They have a complex, rich flavor, deep reddish purple color, superior texture and size over other blackberry varietals. Somewhat like the Boysenberry in size a color and also flavor.