Marsilea quadrifolia
Marsilea quadrifolia
(European water-clover)
Plants
Exotic
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16 results for Marsilea quadrifolia (European water-clover)
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Specimen IDStateCountyLocalityYear HUC Number What's this? Drainage nameStatus
257166 DC Middle Potomac-Anacostia-Occoquan drainage2008 02070010 Middle Potomac-Anacostia-Occoquancollected
245016 ILColesColes County2008 05120112 Embarrascollected
245018 ILJacksonJackson County2008 07140100 Upper Mississippi-Merameccollected
245017 ILMadisonMadison County2008 07140100 Upper Mississippi-Merameccollected
245019 ILMcDonoughMcDonough County2008 07130010 La Moinecollected
1409781 MANorfolkMann's Pond - shoreline west of dam2008 01090001 Charlesunknown
257169 NC state non-specific2008  collected
1320823 NJMorrisJuliet Lake2008 02030103 Hackensack-Passaicunknown
1397717 NJMorrisJuliet Lake2008 02030103 Hackensack-Passaicunknown
245023 NYFranklinFranklin County2008 04150300 St. Lawrencecollected
245021 NYNiagaraNiagara County2008 04000000 Great Lakes Regioncollected
245020 NYOrangeOrange County2008 02020007 Rondoutcollected
245022 NYSenecaSeneca County2008 04140201 Senecacollected
888261 NYSuffolkLotus Lake2008 02030202 Southern Long Islandestablished
1763657 NYSuffolkLotus Lake2008 02030202 Southern Long Island 
257168 WA state non-specific2008 17000000 Pacific Northwest Regioncollected

Data Disclaimer: Number of records does not imply species abundance. This summary represent collection records only and may not reflect the actual distribution of established populations. These data are preliminary or provisional and are subject to revision. They are being provided to meet the need for timely best science. The data have not received final approval by the U.S. Geological Survey (USGS) and are provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the data.

Disclaimer:

The data represented on this site vary in accuracy, scale, completeness, extent of coverage and origin. It is the user's responsibility to use these data consistent with their intended purpose and within stated limitations. We highly recommend reviewing metadata files prior to interpreting these data.

Citation information: U.S. Geological Survey. [2026]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [2/22/2026].

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For general information and questions about the database, contact Wesley Daniel. For problems and technical issues, contact Matthew Neilson.