• Hedyotis Linnaeus, 1753
• Hedyotis acerosa Gray accepted as Houstonia acerosa (Gray) Gray ex Benth. & Hook. f.
• Hedyotis acuminata (Cham. & Schlecht.) Steud.
• Hedyotis angulata Fosberg ex Shinners
• Hedyotis angusta Fosberg accepted as Hedyotis schlechtendahliana Steud.
• Hedyotis australis W.H. Lewis & D.M. Moore accepted as Houstonia micrantha (Shinners) Terrell
• Hedyotis boscii DC. accepted as Oldenlandia boscii (DC.) Chapman
• Hedyotis butterwickiae (Terrell) Nesom
• Hedyotis caerulea (L.) Hook. accepted as Houstonia caerulea Linnaeus
• Hedyotis callitrichoides (Griseb.) W.H. Lewis accepted as Oldenlandiopsis callitrichoides (Griseb.) Terrell & W.H. Lewis
• Hedyotis canadensis (Willd. ex Roemer & J.A. Schultes) Fosberg accepted as Houstonia canadensis Willd. ex Roemer & J.A. Schultes
• Hedyotis centranthoides (Hook. & Arn.) Steud.
• Hedyotis cervantesii Kunth accepted as Houstonia wrightii Gray
• Hedyotis commutata J.A. & J.H. Schultes accepted as Oldenlandia lancifolia (Schumacher) DC.
• Hedyotis cookiana (Cham. & Schlecht.) Steud.
• Hedyotis coriacea Sm.
• Hedyotis correllii W.H. Lewis accepted as Houstonia correllii (W.H. Lewis) Terrell
• Hedyotis corymbosa (L.) Lam. accepted as Oldenlandia corymbosa Linnaeus
• Hedyotis crassifolia Raf. accepted as Houstonia pusilla Schoepf
• Hedyotis croftiae (Britt. & Rusby) Shinners accepted as Houstonia croftiae Britt. & Rusby
• Hedyotis degeneri Fosberg
• Hedyotis elatior (Mann) Fosberg
• Hedyotis fasciculata Bertol. accepted as Oldenlandia uniflora Linnaeus
• Hedyotis fluviatilis (Forbes) Fosberg
• Hedyotis foggiana Fosberg
• Hedyotis foliosa (Hbd.) Fosberg
• Hedyotis formosa (Hbd.) Fosberg
• Hedyotis fosbergii W.L. Wagner & Herbst
• Hedyotis glaucifolia (Gray) Fosberg accepted as Hedyotis schlechtendahliana Steud.
• Hedyotis greenei (Gray) W.H. Lewis
• Hedyotis greenmanii Fosberg accepted as Houstonia parviflora Holz. ex Greenm.
• Hedyotis halei Torr. & Gray accepted as Pentodon pentandrus (K. Schum.) Vatke
• Hedyotis hillebrandii (Fosberg) W.L. Wagner & Herbst
• Hedyotis humifusa Gray accepted as Houstonia humifusa (Gray) Gray
• Hedyotis intricata Fosberg
• Hedyotis knudsenii (Hbd.) Fosberg
• Hedyotis kundsenii (Hillebr.) Fosb.
• Hedyotis lanceolata Poir. accepted as Houstonia purpurea Linnaeus
• Hedyotis lancifolia Schumacher accepted as Oldenlandia lancifolia (Schumacher) DC.
• Hedyotis littoralis (Hbd.) Fosberg
• Hedyotis longifolia (Gaertn.) Hook. accepted as Houstonia longifolia Gaertn.
• Hedyotis mannii Fosberg
• Hedyotis michauxii Fosberg accepted as Houstonia serpyllifolia Michx.
• Hedyotis molokaiensis Fosberg accepted as Hedyotis mannii Fosberg
• Hedyotis mullerae Fosberg
• Hedyotis nigricans (Lam.) Fosberg
• Hedyotis nuttalliana Fosberg accepted as Houstonia longifolia Gaertn.
• Hedyotis ouachiitana E.B. Smith
• Hedyotis ouachitana E.B. Sm. accepted as Houstonia ouachitana (E.B. Sm.) Terrell
• Hedyotis parvula (Gray) Fosberg
• Hedyotis pentandra K. Schum. accepted as Pentodon pentandrus (K. Schum.) Vatke
• Hedyotis polypremoides (Gray) Shinners accepted as Houstonia acerosa (Gray) Gray ex Benth. & Hook. f.
• Hedyotis ponapensis Valeton
• Hedyotis pooleana B.L. Turner
• Hedyotis procumbens (Walt. ex J.F. Gmel.) Fosberg accepted as Houstonia procumbens (Walt. ex J.F. Gmel.) Standl.
• Hedyotis purpurea (L.) Torr. & Gray accepted as Houstonia purpurea Linnaeus
• Hedyotis pygmaea Roemer & J.A. Schultes accepted as Houstonia wrightii Gray
• Hedyotis remyi (Hbd.) Fosberg accepted as Hedyotis schlechtendahliana Steud.
• Hedyotis rigida Fosberg
• Hedyotis rosea Raf. accepted as Houstonia rosea (Raf.) Terrell
• Hedyotis rubra (Cav.) Gray accepted as Houstonia rubra Cav.
• Hedyotis salina (Heller) Shinners accepted as Hedyotis nigricans (Lam.) Fosberg
• Hedyotis salzmannii (DC.) Steud. accepted as Oldenlandia salzmannii (DC.) Benth. & Hook. f. ex B.D. Jackson
• Hedyotis schlechtendahliana Steud.
• Hedyotis st.-johnii B.C. Stone & M.A. Lane
• Hedyotis subviscosa (C. Wright ex Gray) Shinners accepted as Houstonia subviscosa (C. Wright ex Gray) Gray
• Hedyotis tayloriae Fosberg accepted as Houstonia rosea (Raf.) Terrell
• Hedyotis terminalis (Hook. & Arn.) W.L. Wagner & Herbst
• Hedyotis thyrsoidea Fosberg accepted as Hedyotis mannii Fosberg
• Hedyotis tryblium Herbst & W.L. Wagner
• Hedyotis uniflora (L.) Lam. accepted as Oldenlandia uniflora Linnaeus
• Hedyotis vegrandis W.H. Lewis
• Hedyotis wrightii (Gray) Fosberg accepted as Houstonia wrightii Gray