| Specimen ID | State | County | Locality | Year | HUC Number | Drainage Name | Status |
| 1599771 | MI | Van Buren | [No locality description provided] | 2012 | 04050001 | St. Joseph | established |
| 1599772 | MI | Van Buren | [No locality description provided] | 2012 | 04050001 | St. Joseph | established |
| 1599773 | MI | Van Buren | [No locality description provided] | 2012 | 04050001 | St. Joseph | established |
| 1599774 | MI | Van Buren | [No locality description provided] | 2012 | 04050001 | St. Joseph | established |
| 1599775 | MI | Van Buren | [No locality description provided] | 2012 | 04050001 | St. Joseph | established |
| 1599776 | MI | Van Buren | [No locality description provided] | 2012 | 04050001 | St. Joseph | established |
| 1599770 | MI | Van Buren | [No locality description provided] | 2012 | 04050001 | St. Joseph | established |
Citation for this information:
U.S. Geological Survey, 2025,
Butomus umbellatus: U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov, Access Date: 12/18/2025