| Scientific Name: | Azolla filiculoides |
| Common Name: | Fairy moss, mosquito fern |
| Family Name: | Salviniaceae |
| Origin: | North America, South America |
| Hardiness Zone: | Zone 7: (-18 to -12 °C) |
| Plant Type: | Aquatic plant, Fern, Herbaceous perennial |
| Mature Size: | < 0.1m x < 0.1m (height x width) |
| Habit: | Horizontal, Spreading |
| Form: | Creeping / Mat-like |
| Texture: | Fine |
| Landscape Uses: | Aquatic - ponds |
| Exposure: | Full sun, Part sun/part shade |
| Soil or Media: | |
| Leaves: | Simple, Lobed, Fern-like, Imbricate, Soft flexible, Pubescent, Reniform, Entire |
| Flowers: | |
| Fruit: | Sporangium (spores), Brown, Jul-Aug |
| Key ID Features: | |
| Rapidly expanding tiny fern on still water surfaces with dark brown-black rhizoids; fronds densely overlapping, forming moss-like mats mostly 2-6cm long of foliage about 1mm long; sporangia <1mm long form in summer on upper surface. | |