This is a list of noxious and invasive species compiled from the Texas Department of Agriculture, Texasinvasives.org and Texas Parks and Wildlife Dept.
http://www.texasinvasives.org/
http://texreg.sos.state.tx.us/fids/200701978-1.html
http://www.texasagriculture.gov/regulatoryprograms/plantquality/noxiousandinvasiveplants.aspx
http://tpwd.texas.gov/huntwild/wild/species/exotic/prohibited_aquatic.phtml