Starr is the only known series in the same family. Other competing series in related families include the Alamuchee , Congaree , Ennis , Pruitton , and Shellbluff series. Starr soils typically have Bw horizons with hue of 7.5YR or redder throughout. Alamuchee, Ennis, and Pruitton soils have siliceous mineralogy. Congaree soils do not have a cambic horizon.
Shellbluff soils have a fine-silty particle size control section.
Riverview soils are on high parts of flood plains of rivers and streams draining the Coastal Plain and Southern Piedmont. Slopes range from 0 to 5 percent. They formed in loamy alluvium. The average annual air temperature ranges from 61 to 68 degrees F. and average annual precipitation ranges from 50 to 60 inches. These are the Bruno , Buncombe , Cahaba , Chewacla , Kalmia , Ochlockonee , State , Wehadkee , Wickham series.