| Specimen ID | State | County | Locality | Year | HUC Number | Drainage Name | Status |
| 1556979 | MI | Saginaw | [No locality description provided] | 2013 | 04080205 | Cass | established |
| 1556981 | MI | Saginaw | [No locality description provided] | 2013 | 04080205 | Cass | established |
| 1556983 | MI | Saginaw | [No locality description provided] | 2013 | 04080205 | Cass | established |
| 1556995 | MI | Saginaw | [No locality description provided] | 2013 | 04080205 | Cass | established |
| 1556978 | MI | Saginaw | [No locality description provided] | 2013 | 04080205 | Cass | established |
| 1556982 | MI | Saginaw | [No locality description provided] | 2013 | 04080205 | Cass | established |
| 1556992 | MI | Saginaw | [No locality description provided] | 2013 | 04080205 | Cass | established |
| 1556996 | MI | Saginaw | [No locality description provided] | 2013 | 04080205 | Cass | 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