limestone fern
- kingdom: Plantae
- phylum: Tracheophyta
- class: Polypodiopsida
- order: Polypodiales
- family: Cystopteridaceae
- genus: Gymnocarpium
- species: Gymnocarpium robertianum
- Friesach
Carinthia- Bad Vöslau
- Kottingbrunn
Lower Austria- Werfenweng
Salzburg- Navis
Tyrol
Austria- Havre-Saint-Pierre
Quebec
Canada- Kerimäki
Southern Ostrobothnia
Finland- France
- Burghausen
- Haiming
Bavaria- Echternacherbrück
- Nittel
- Wellen
Rheinland-Pfalz
Germany- Heer
Limburg
Netherlands- Tavannes
Bern
Switzerland- Mendip
England
United Kingdom