Quercus sinuata, the bastard oak, bastard white oak, or Durand oak, is North American species of oak. It is native to northern Mexico (Coahuila, Nuevo León, and Tamaulipas) as well as to the southeastern and south-central United States (from Texas and Oklahoma to the Carolinas). Quercus sinuata is a deciduous tree up to 20 meters (67 feet) tall. Leaves are narrow, with shallow rounded lobes. It tends to grow in wet habitats, such as on river bluffs, river bottoms, and flatwoods, and generally over basic substrates, such as mafic rocks, shells, or calcareous sediment.