| Barclayaceae | |
Barclayaceae
| H. L. Li | | 1955 |
| Cabombaceae | !! |
Cabombaceae
| Rich. ex A. Rich. | Dict. Class. Hist. Nat. 2: 608 | 1822 |
| Euryalaceae | |
Euryalaceae
| J. Agardh | Theoria Syst. Pl. 51 | 1858 |
| Hydatellaceae | |
Hydatellaceae
| U. Hamann | New Zealand J. Bot. 14: 195 | 1976 |
| Hydropeltidaceae | |
Hydropeltidaceae
| DC. | Comment. Bot. 64 | 1822 |
| Nupharaceae | |
Nupharaceae
| A. Kern. | Pflanzenleben 2: 699 | 1891 |
| Nymphaeaceae | !! |
Nymphaeaceae
| Salisb. | Ann. Bot. (König & Sims) 2: 70 | 1805 |