(Houstonia purpurea)

Houstonia purpurea is a species in the Houstonia genus. This name is accepted name for the species in the family Rubiaceae subfamily Rubioideae, tribe Spermacoceae, . . This species is found in Alabama, Arkansas, Delaware, Georgia, Illinois, Indiana, Kentucky, Louisiana, Maryland, Mississippi, Missouri, North Carolina, Ohio, Oklahoma, Pennsylvania, South Carolina, Tennessee, Texas, Vermont, Virginia, West Virginia.