| Salviniaceae | |
|---|---|
 | |
| Salvinia natans | |
Scientific classification | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Division: | Polypodiophyta |
| Class: | Polypodiopsida |
| Order: | Salviniales |
| Family: | Salviniaceae Martinov |
| Genera | |
Salviniaceae (/sælˌvɪniˈeɪsiˌiː/),[1][2] is afamily ofheterosporousferns in the orderSalviniales.[3] The Salviniaceae contain the two generaAzolla andSalvinia,[4] with about 20 known species in total.[5] The oldest records of the family date to the Late Cretaceous.[6]Azolla was previously placed in its own family,Azollaceae, but research has shownAzolla andSalvinia to be sister genera with the likelyphylogenic relationship shown in the following diagram.[7]
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