• Oldenlandia Linnaeus, 1753
• Oldenlandia acerosa (Gray) Gray accepted as Houstonia acerosa (Gray) Gray ex Benth. & Hook. f.
• Oldenlandia angustifolia (Michx.) Gray accepted as Hedyotis nigricans (Lam.) Fosberg
• Oldenlandia biflora Linnaeus
• Oldenlandia boscii (DC.) Chapman
• Oldenlandia callitrichoides Griseb. accepted as Oldenlandiopsis callitrichoides (Griseb.) Terrell & W.H. Lewis
• Oldenlandia corymbosa Linnaeus
• Oldenlandia fasciculata (Bertol.) Small accepted as Oldenlandia uniflora Linnaeus
• Oldenlandia fasciculatus (Bertol.) Small
• Oldenlandia greenei Gray accepted as Hedyotis greenei (Gray) W.H. Lewis
• Oldenlandia herbacea (L.) Roxb.
• Oldenlandia humifusa (Gray) Gray accepted as Houstonia humifusa (Gray) Gray
• Oldenlandia lancifolia (Schumacher) DC.
• Oldenlandia rubra (Cav.) Gray accepted as Houstonia rubra Cav.
• Oldenlandia salzmannii (DC.) Benth. & Hook. f. ex B.D. Jackson
• Oldenlandia subviscosa C. Wright ex Gray accepted as Houstonia subviscosa (C. Wright ex Gray) Gray
• Oldenlandia uniflora Linnaeus