Quercus robusta, also called robust oak, is a rare North American species of oak. It has been found only in the Chisos Mountains inside Big Bend National Park in western Texas.
Quercus robusta is a deciduous tree growing up to tall. The bark is black or brown, the twigs dark reddish brown. The leaves are up to long, with a few teeth or small lobes along the edges. The tree grows in moist, wooded canyons.