| Scientific Name | Images |
|---|---|
| Althenia australis | |
| Australian Water-mat | |
| Althenia bilocularis | |
| Feather-style Water-mat | |
| Althenia cylindrocarpa | |
| Long-fruit Water-mat | |
| Althenia marina | |
| Sea Water-mat | |
| Althenia preissii | |
| Slender Water-mat | |
| Althenia sp. Patentifolia | |
| Spreading Water-mat | |
| Zannichellia palustris | |