| Name | From | To | Age range |
|---|---|---|---|
| Azolla microphylla | Early Miocene | Early Miocene |
|
| Azolla agittifera | Late Cretaceous | Late Cretaceous |
|
| Azolla polyancyra | Late Cretaceous | Late Cretaceous |
|
| Azolla mexicana | Maastrichtian | Maastrichtian |
|
| Azolla grandipolina | Oligocene | Oligocene |
|
| Azolla sulaensis | Miocene | Miocene |
|
| Azolla geneseana | Cretaceous | Cretaceous |
|
| Azolla deccaniana | Cretaceous | Cretaceous |
|
| Azolla africana | Early Miocene | Early Miocene |
|
| Azolla tertiaria | Miocene | Miocene |
|
| Azolla imbricata | Paleocene | Paleocene |
|
| Azolla caroliniana | Paleocene | Paleocene |
|
| Azolla pulchella | Miocene | Miocene |
|
| Azolla type 1 | Late Maastrichtian | Late Maastrichtian |
|
| Azolla type 2 | Late Maastrichtian | Late Maastrichtian |
|
| Azolla guinensis | Early Miocene | Early Miocene |
|