The main belt consists of oaklands and savannas and runs from just south of the Red River on the Texas-Oklahoma border through the Dallas-Fort Worth region and into southwestern Texas. The Central forest-grasslands transition lies to the north and northwest, and the Edwards Plateau savanna and the Tamaulipan mezquital the southwest.
The larger of the two islands is the Fayette Prairie, encompassing 17,000 km², and the smaller is the San Antonio Prairie of 7,000 km². The two islands are separated from the main belt by the oak woodlands of the East Central Texas forests, which surround the islands on all sides but the northeast, where the Fayette Prairie meets the Piney Woods forests.
This area was shaped by frequent fire and American bison. Large fires would frequently sweep the area, clearing shrubs and stimulating forbs and grasses. Large herds of bison also grazed on the grasses.
Vascular Plant Flora of the Remnant Blackland Prairies in Oaky Woods Wildlife Management Area, Houston County, Georgia
Mar 01, 2010; ABSTRACT blackland prairies are a globally imperiled, rare plant community only recently discovered in central Georgia. A...