| Kingdom: | Plantae |
| Phylum: | Pteridiphyta |
| Class: | Polypodiopsida |
| Order: | Marsileales |
- Family
- Genus
- species – Common Name
- Marsilea
- macropoda – Bigfoot Water-clover
- mexicana – Mexican Water-clover
- quadrifolia – European Water-clover
- tenufolia – Narrow-leaved Water-clover
- uncinata – Hooked Water-clover
- vestita – Hairy Water-clover
- Pilularia
- americana – American Pillwort
- novae-zelandiae – New Zealand Pillwort
- globulifera – Pillwort
- Regnellidium
- diphyllum – Two-leaf Water Fern
Marsileaceae
