1) Family salviniaceae 2) Fern family 3) Water ferns 
Salviniaceae is a family of heterosporous ferns in the order Salviniales. The Salviniaceae contain the two genera Azolla and Salvinia. Azolla was previously placed in its own family, Azollaceae, but recent research has shown Azolla and Salvinia to be sister genera with the likely phylogenic relationship shown in the following diagram. }} ...
(from the article `fern`) ...SalvinialesFloating aquatics with small, rounded sporangia contained in saclike indusia; leaves sessile; heterosporous.Family Salviniaceae (water ...
[n] - water ferns
family Salviniaceae noun water ferns