Houstonia angustifolia Michx.
Hedyotis rupestris Walp.
Hedyotis nigricans var. pulvinata (Small) Fosberg
Hedyotis lasiantha Nutt. ex A.Gray
Houstonia angustifolia var. filifolia (Chapm.) A.Gray
Chamisme angustifolia (Michx.) Nieuwl.
Houstonia pulvinata Small
Houstonia filifolia (Chapm.) Small
Houstonia angustifolia var. scabra S.Watson
Houstonia tenuis Small
Hedyotis nigricans var. filifolia (Chapm.) Shinners
Hedyotis nigricans var. austrotexana B.L.Turner
Oldenlandia angustifolia var. filifolia Chapm.
Hedyotis stenophylla Torr. & A.Gray
Houstonia nigricans var. papillacea (B.L.Turner) Allred
Hedyotis nigricans var. papillacea B.L.Turner
Houstonia nigricans var. pulvinata (Small) Terrell
Hedyotis nigricans var. scabra (S.Watson) Fosberg
Hedyotis salina (A.Heller) Shinners
Houstonia salina A.Heller
Hedyotis fruticosa Walp.
Houstonia fruticosa Raf. ex A.Gray