- Diplophragma tetrangulare Korth.

- Diplophragma tetrangularis Korth.

- Hedyotis parryi Hance

- Hedyotis quadrangularis Miq.

- Oldenlandia parryi (Hance) Kuntze

- Oldenlandia quadrangularis (Miq.) Kuntze

- Oldenlandia subdivaricata Drake

- Oldenlandia tetrangularis (Korth.) Merr.