.
| Specimen ID | State | County | Locality | Year | HUC Number | Drainage Name | Status |
| 246657 | IN | LaGrange | LaGrange County | 2008 | 04050001 | St. Joseph | collected |
| 246658 | IN | Steuben | Steuben County | 2008 | 04050001 | St. Joseph | collected |
| 246659 | IN | Noble | Noble County | 2008 | 04050001 | St. Joseph | collected |
| 246652 | IN | Porter | Porter County | 2008 | 04040001 | Little Calumet-Galien | collected |
| 246654 | IN | St. Joseph | St. Joseph County | 2008 | 04050001 | St. Joseph | collected |
| 246662 | IN | Allen | Allen County | 2008 | 04100005 | Upper Maumee | collected |
| 246651 | IN | Lake | Lake County | 2008 | 04040001 | Little Calumet-Galien | collected |
| 246660 | IN | DeKalb | DeKalb County | 2008 | 04100003 | St. Joseph | collected |
Citation for this information:
U.S. Geological Survey, 2024,
Agrostis gigantea: U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov, Access Date: 5/2/2024