| Hydatellaceae | |
Hydatella australis
| Diels | Bot. Jahrb. Syst. 35: 93 | 1904 |
| Hydatellaceae | |
Hydatella dioica
| D.A. Cooke | Muelleria 5: 124 | 1981 [1983] |
| Hydatellaceae | |
Hydatella filamentosa
| (Rodway) W.M. Curtis | Rec. Queen Victoria Mus. 50: 5 | 1974 |
| Hydatellaceae | |
Hydatella inconspicua
| (Cheeseman) Cheeseman | Trans. & Proc. New Zealand Inst. 39: 434 | 1906 |
| Hydatellaceae | |
Hydatella leptogyne
| Diels | Bot. Jahrb. Syst. 35: 93 | 1904 |