| Acanthaceae | |
Forsythiopsis australis
| Scott Elliot | J. Linn. Soc., Bot. 29: 37 | 1891 |
| Acanthaceae | |
Forsythiopsis baronii
| Baker | J. Linn. Soc., Bot. 20: 219 | 1883 |
| Acanthaceae | |
Forsythiopsis linifolia
| Benoist | Notul. Syst. (Paris) 12: 11 | 1945 |
| Acanthaceae | |
Forsythiopsis minor
| Benoist | Bull. Soc. Bot. France 76: 1033–1034 | 1929 |
| Acanthaceae | |
Forsythiopsis vincoides
| (Lam.) Benoist | Cat. Pl. Madag., Acanth. 15 | 1939 |