Quercus incana is a species of oak known by the common names bluejack oak, upland willow oak, sandjack oak, and cinnamon oak. It is native to the Atlantic and Gulf coastal plains of the United States, from Virginia around Florida to Texas and inland to Oklahoma and Arkansas.Quercus incana is a tree growing to about 10 meters (33 feet) in height, with a maximum height around 15 meters. The 'national champion bluejack' was a specimen from Texas that was 15.5 meters (51 feet) tall and 2.1 meters (7 ...