| Specimen ID | State | County | Locality | Year | HUC Number | Drainage Name | Status |
| 233750 | NY | Cayuga | Cayuga Lake Basin | 1925 | 04140201 | Seneca | established |
| 234379 | NY | Onondaga | Thornden Park | 1916 | 04140201 | Seneca | established |
| 233236 | NY | Tompkins | edge of lagoon in Stewart Park | 1939 | 04140201 | Seneca | established |
| 233199 | NY | Tompkins | Cascadilla Creek, Ithaca | 1893 | 04140201 | Seneca | established |
| 233198 | NY | Tompkins | Cayuga Lake | 1915 | 04140201 | Seneca | established |
| 245022 | NY | Seneca | Seneca County | 2008 | 04140201 | Seneca | collected |
| 866220 | NY | Tompkins | [No locality provided] | 2011 | 04140201 | Seneca | unknown |
| 866955 | NY | Tompkins | [No locality provided] | 2014 | 04140201 | Seneca | unknown |
| 866956 | NY | Tompkins | [No locality provided] | 2014 | 04140201 | Seneca | unknown |
| 866988 | NY | Tompkins | [No locality provided] | 2014 | 04140201 | Seneca | unknown |
| 867026 | NY | Tompkins | Cayuga Lake | 2014 | 04140201 | Seneca | unknown |
| 871522 | NY | Tompkins | [No locality provided] | 2011 | 04140201 | Seneca | unknown |
| 888260 | NY | Tompkins | Fall Creek | 2011 | 04140201 | Seneca | established |
| 1653913 | NY | Tompkins | Ithaca, NY, USA | 2020 | 04140201 | Seneca | established |
| 1760308 | NY | Tompkins | Fall Creek | 2011 | 04140201 | Seneca | |
| 1808702 | NY | Tompkins | Fall Creek | 2011 | 04140201 | Seneca | |
| 1815871 | NY | Tompkins | Fall Creek | 2015 | 04140201 | Seneca | |
| 1812080 | NY | Tompkins | Fall Creek | 2014 | 04140201 | Seneca | |
| 1815865 | NY | Tompkins | Fall Creek | 2015 | 04140201 | Seneca | |
| 1812081 | NY | Tompkins | Fall Creek | 2014 | 04140201 | Seneca | |
| 1813630 | NY | Tompkins | [No locality description provided] | 2014 | 04140201 | Seneca | |
| 1813675 | NY | Tompkins | Cayuga Lake | 2014 | 04140201 | Seneca | |
| 1815866 | NY | Tompkins | Fall Creek | 2015 | 04140201 | Seneca | |
| 1815858 | NY | Tompkins | Cayuga Lake,Cayuga Lake | 2015 | 04140201 | Seneca | |
| 1815868 | NY | Tompkins | [No locality description provided] | 2015 | 04140201 | Seneca | |
| 1815876 | NY | Tompkins | Fall Creek | 2015 | 04140201 | Seneca | |
| 1815903 | NY | Tompkins | Cayuga Lake,Cayuga Lake | 2015 | 04140201 | Seneca | |
| 1830727 | NY | Tompkins | [No locality description provided] | 2019 | 04140201 | Seneca | |
| 1833950 | NY | Tompkins | [No locality description provided] | 2018 | 04140201 | Seneca | |
Citation for this information:
U.S. Geological Survey, 2025,
Marsilea quadrifolia: U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov, Access Date: 12/18/2025