Many, see text Oldenlandia is a genus of flowering plants in the family Rubiaceae.

[5] The name honors the Danish botanist Henrik Bernard Oldenland (c. 1663 – 1697).

Some botanists have not recognized Oldenlandia, but have placed some or all of its species in a broadly defined Hedyotis.

[7] More recently, the circumscription of Hedyotis has been narrowed to a monophyletic group of about 115 species and no longer includes Oldenlandia.

[8] The genus Oldenlandia, as presently defined, is several times polyphyletic and will eventually be reduced to a group of species closely related to the type species.