Vegetation Areas of Texas Vegetation Areas of Texas Differences in soil, climate and rainfall are responsible for the great variety of vegetation found in Texas. The area receives about 40 - 60 inches of rainfall per year, and many rivers, bayous, and creeks are found there.
Vegetation includes pine trees, hardwood trees, and grassland plants.
Some hardwoods grow in the area, but the area is primarily known for its grasses. Some brushy plants and cacti may also be found. This is a secondary forest of about 9 million acres. It has less rainfall than the Piney Woods, and is higher in elevation. Its soil composition is sandy and sandy loam in the upland areas, and sandy loams and clays in the bottomlands.