Compiled from Jason Singhurst's list, NatureServe Explorer (http://explorer.natureserve.org/servlet/NatureServe?sourceTemplate=tabular_report.wmt&loadTemplate=systems_RptComprehensive.wmt&selectedReport=RptComprehensive.wmt&summaryView=tabular_report.wmt&elKey=723152&paging=home&save=true&startIndex=1&nextStartIndex=1&reset=false&offPageSelectedElKey=723152&offPageSelectedElType=systems&offPageYesNo=true&post_processes=&radiobutton=radiobutton&selectedIndexes=723152&selectedIndexes=687316&selectedIndexes=686865&selectedIndexes=905018) and Texas Parks and Wildlife (https://tpwd.texas.gov/landwater/land/programs/landscape-ecology/ems/emst/sparsely-vegetated/west-gulf-coastal-plain-catahoula-barrens)