Cisco and Duffau soils are higher in the landscape on stream divides and along upland drainageways. Bosque soils have mollic epipedons and are lower in the landscape on flood plains. Nimrod soils have sandy epipedons 20 to 40 inches thick and are higher in the landscape on stream divides and low ridges. Pedernales and Windthorst soils have reddish clayey argillic horizons and are higher in the landscape on hillsides and stream divides. Most of May soils are in positions that receive extra water from adjacent higher areas.
Native vegetation is mid and tall grasses and post oak, live oak, and mesquite trees.
In the Cross Timbers, Central Rolling Red Prairies and fringe areas of the Grand Prairie in central Texas.