| Name | From | To | Age range |
|---|---|---|---|
| Azolla grandipolina | Oligocene | Oligocene |
|
| Azolla guinensis | Early Miocene | Early Miocene |
|
| Azolla hamata | Cretaceous | Early Maastrichtian |
|
| Azolla imbricata | Paleocene | Paleocene |
|
| Azolla indica | Cretaceous | Lutetian |
|
| Azolla interglacialica | Langhian | Pleistocene |
|
| Azolla intertrappea | Cretaceous | Lutetian |
|
| Azolla irtyshensis | Toarcian | Messinian |
|
| Azolla kryshtofovichii | Aquitanian | Burdigalian |
|
| Azolla lamkiana | Karaganian | Sarmatian |
|
| Azolla lauta | Cretaceous | Thanetian |
|
| Azolla massula | Late Cretaceous | Early Tertiary |
|
| Azolla mexicana | Maastrichtian | Maastrichtian |
|
| Azolla microphylla | Early Miocene | Early Miocene |
|
| Azolla monilifera | Miocene | Piacenzian |
|
| Azolla montana | Cretaceous | Recent |
|
| Azolla nana | Rupelian | Messinian |
|