Water fern
- kingdom: Plantae
- phylum: Tracheophyta
- class: Polypodiopsida
- order: Salviniales
- family: Salviniaceae
- genus: Azolla
- species: Azolla filiculoides
Mburucuyá
Corrientes
Argentina
Darling Point
Darlinghurst
Haberfield
Haymarket
Kirribilli
Milsons Point
North Sydney
Sydney
New South Wales
Australia
Brussels
Brussels Capital
Aalst
Alveringem
Avelgem
Bornem
Bredene
Brugge
Damme
Dendermonde
Destelbergen
Edegem
Evergem
Geel
Gent
Gistel
Harelbeke
Hasselt
Hemiksem
Herentals
Hoboken
Hoeilaart
Hove
Ieper
Ingelmunster
Jabbeke
Kinrooi
Kontich
Kuurne
Ledeberg
Lochristi
Lovendegem
Mechelen
Merelbeke
Middelkerke
Mortsel
Niel
Nieuwpoort
Oudenaarde
Oudenburg
Retie
Schelle
Sint-Amands
Sint-Kruis
Veurne
Vorselaar
Waregem
Wemmel
Zeebrugge
Zonhoven
Zuienkerke
Zulte
Zwijndrecht
Flanders
Belgium
Cochabamba
Cochabamba
Bolivia
Ibirama
Santa Catarina
Brazil
Ladner
Pitt Meadows
Salmon Arm
British Columbia
Canada
La Serena
Coquimbo Region
Chile
Aranzazu
Caldas
Colombia
Bagaces
Guanacaste
Costa Rica
Olomouc
Olomoucký
Czech Republic
Otavalo
Imbabura
Ecuador- France
Rennertshofen
Bavaria
Barleben
Rogätz
Wolmirstedt
Saxony-Anhalt
Germany
Jocotenango
Pastores
Sacatepéquez
Guatemala
Concepción de Guasistagua
Comayagua
Honduras
Cuernavaca
Morelos
Mexico
Lund
Skåne
Bergshamra
Djursholm
Stockholm
Sweden- United Kingdom
Firebaugh
Graton
San Mateo
Scotts Valley
Weldon
California
Apalachicola
Florida
Anna
Illinois
Baldwinsville
Manhattan
Riverhead
New York
Ridgefield
Seattle
Yakima
Washington
United States
Équeurdreville-Hainneville
Joure
Borough Green