- 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.