Azolla
（重定向自Mosquito Fern）
![](/Images/godic/202501/28/Azolla_caroliniana05506.jpg")
![Drawing of Azolla filiculoides, about 5 mm. Upper green leaves perform photo synthesis, lower lack chlorophyll](/Images/godic/202501/28/Azolla_filiculoides_drawing5506.png")
![Azolla covering the Canning River](/Images/godic/202501/28/Canning_rv_azolla_10_gnangarra5507.jpg")
![Azolla on the Canning River, Western Australia](/Images/godic/202501/28/Canning_rv_azolla_02_gnangarra5507.jpg")
Azolla (mosquito fern, duckweed fern, fairy moss, water fern) is a genus of seven species of aquatic ferns in the family Salviniaceae. They are extremely reduced in form and specialized, looking nothing like other typical ferns but more resembling duckweed or some mosses.