| Lythraceae | |
Trapa natans var. africana
| Brenan | Kew Bull. 1953: 171 | 1953 |
| Lythraceae | |
Trapa natans var. amurensis
| (Flerow) Kom. | | |
| Lythraceae | |
Trapa natans var. bicornis
| (Osbeck) Makino | Bot. Mag. (Tokyo) 11: (283) | 1897 |
| Lythraceae | * |
Trapa natans var. bicornis
| (Osbeck) Makino | Icon. Pl. Japon. 3(1): 81 | 1907 |
| Lythraceae | * |
Trapa natans var. bispinosa
| Makino | Somoku-Dzusetsu 1(2): 79, pl. 52 | 1907 |
| Lythraceae | |
Trapa natans var. bispinosa
| (Roxb.) Makino | Bot. Mag. (Tokyo) 11: (283) | 1897 |
| Lythraceae | * |
Trapa natans var. incisa
| Makino | Somoku-Dzusetsu 1(2): 81, pl. 53 | 1907 |
| Lythraceae | * |
Trapa natans var. incisa
| (Siebold & Zucc.) Makino | Bot. Mag. (Tokyo) 22: 172 | 1908 |
| Lythraceae | |
Trapa natans var. incisa
| (Siebold & Zucc.) Makino | Bot. Mag. (Tokyo) 11: (283) | 1897 |
| Lythraceae | |
Trapa natans var. japonica
| Nakai | J. Jap. Bot. 18(8): 429, 431 | 1942 |
| Lythraceae | |
Trapa natans var. natans
| L. | | |
| Lythraceae | |
Trapa natans var. pumila
| Nakano ex Verdc. | Kew Bull. 41: 448 | 1986 |
| Lythraceae | * |
Trapa natans var. pumila
| Nakano | Bot. Mag. (Tokyo) 77: 166 | 1964 |
| Lythraceae | |
Trapa natans fo. quadrispinosa
| (Roxb.) Makino | Bot. Mag. (Tokyo) 22: 172 | 1908 |
| Lythraceae | |
Trapa natans var. quadrispinosa
| (Roxb.) Makino | Somoku-Dzusetsu 1(2): 81 | 1907 |