The vegetation along its course varies from chaparral, mesquite, and grasses in the upper reaches, to water-tolerant hardwoods, conifers, and grasses in the middle section, to pecans, other hardwoods, and grasses in the lower reaches. The stream rises in low-rolling hills and continues through flat terrain with locally shallow depressions before entering terrain with low relief surfaces.
Soils are generally clayey.
The Handbook of Texas Online. The Texas State Historical Association, 1997,1998,1999.