| Acanthaceae | |
Oplonia acicularis
| (Sw.) Stearn | Bull. Brit. Mus. (Nat. Hist.), Bot. 4: 312 | 1971 |
| Acanthaceae | |
Oplonia acuminata
| Stearn | Bull. Brit. Mus. (Nat. Hist.), Bot. 4: 314–315, f. 17C | 1971 |
| Acanthaceae | |
Oplonia acunae
| Borhidi | Acta Bot. Acad. Sci. Hung. 23: 313 | 1978 |
| Acanthaceae | |
Oplonia armata
| (Sw.) Stearn | Bull. Brit. Mus. (Nat. Hist.), Bot. 4: 301 | 1971 |
| Acanthaceae | |
Oplonia baronii
| (Baker) Phillipson & Callm. | | |
| Acanthaceae | |
Oplonia cubensis
| Borhidi | Acta Bot. Acad. Sci. Hung. 23: 309 | 1978 |
| Acanthaceae | |
Oplonia grandiflora
| (Lindau) Stearn | Bull. Brit. Mus. (Nat. Hist.), Bot. 4: 299 | 1971 |
| Acanthaceae | |
Oplonia hutchisonii
| Wassh. | Phytologia 33: 444 | 1976 |
| Acanthaceae | |
Oplonia jamaicensis
| (Lindau) Stearn | Bull. Brit. Mus. (Nat. Hist.), Bot. 4(7): 300 | 1971 |
| Acanthaceae | |
Oplonia jujuyensis
| Wassh. & C. Ezcurra | Novon 3(1): 89, f. 1A–E | 1993 |
| Acanthaceae | |
Oplonia linifolia
| (Benoist) Stearn | Bull. Brit. Mus. (Nat. Hist.), Bot. 4: 320 | 1971 |
| Acanthaceae | |
Oplonia microphylla
| (Lam.) Stearn | Bull. Brit. Mus. (Nat. Hist.), Bot. 4(7): 307 | 1971 |
| Acanthaceae | |
Oplonia minor
| (Benoist) Stearn | Bull. Brit. Mus. (Nat. Hist.), Bot. 4: 319 | 1971 |
| Acanthaceae | |
Oplonia moana
| Borhidi | Acta Bot. Acad. Sci. Hung. 23: 208 | 1978 |
| Acanthaceae | |
Oplonia multigemma
| Borhidi | Acta Bot. Acad. Sci. Hung. 23: 312 | 1978 |
| Acanthaceae | |
Oplonia nannophylla
| (Urb.) Stearn | Bull. Brit. Mus. (Nat. Hist.), Bot. 4: 313 | 1971 |
| Acanthaceae | |
Oplonia polyece
| (Stearn) Borhidi | Acta Bot. Acad. Sci. Hung. 23: 312 | 1978 |
| Acanthaceae | |
Oplonia puberula
| Stearn | Bull. Brit. Mus. (Nat. Hist.), Bot. 4: 317, f. 18 | 1971 |
| Acanthaceae | |
Oplonia purpurascens
| (Griseb.) Stearn | Bull. Brit. Mus. (Nat. Hist.), Bot. 4(7): 313 | 1971 |
| Acanthaceae | |
Oplonia spinosa
| Raf. | Fl. Tellur. 4: 65 | 1836 [1838] |
| Acanthaceae | |
Oplonia tetrasticha
| (C. Wright ex Griseb.) Stearn | Bull. Brit. Mus. (Nat. Hist.), Bot. 4(7): 310 | 1971 |
| Acanthaceae | |
Oplonia vincoides
| (Lam.) Stearn | Bull. Brit. Mus. (Nat. Hist.), Bot. 4: 315, t. 41, 46, f. 17A, B | 1971 |