Four-leaved water clover
- kingdom: Plantae
- phylum: Tracheophyta
- class: Polypodiopsida
- order: Salviniales
- family: Marsileaceae
- genus: Marsilea
- species: Marsilea quadrifolia
Sadovo
Plovdiv
Bulgaria
Mannheim
Baden-Württemberg
Ludwigshafen am Rhein
Rheinland-Pfalz
Germany
Pérama
Crete
Greece
Vésztő
Bekes
Hungary
San Nicola Baronia
San Sossio Baronia
Campania
Genova
Liguria
Gravellona Lomellina
Milano
Pavia
Lombardy
Italy
Rybnik
Silesia
Poland
Cromwell
Hartford
Litchfield
Middlebury
New Haven
Weatogue
Connecticut
Baltimore
Ferndale
Glen Burnie
Maryland
Washington, D. C.
Washington, D.C.
United States
Cuffy
Malu Mare