| Specimen ID | State | County | Locality | Year | HUC Number | Drainage Name | Status |
| 1468713 | MI | Kent | Grand Rapids | 1896 | 04050006 | Lower Grand | established |
| 1458984 | MI | Kent | Century Avenue Railroad Station | 1886 | 04050006 | Lower Grand | established |
| 1462208 | MI | Kent | Fallassburg | 1924 | 04050006 | Lower Grand | established |
| 1463673 | MI | Kent | Shore of Pine Lake, Nelson Township | 1939 | 04050006 | Lower Grand | established |
| 1464431 | MI | Kent | Olin Lake | 1940 | 04050006 | Lower Grand | established |
| 1467908 | MI | Ionia | Long Lake, Iona County | 1950 | 04050006 | Lower Grand | established |
| 1467919 | MI | Kent | Cannon twp, section 14 | 1927 | 04050006 | Lower Grand | established |
| 1468786 | MI | Kent | Short Street, Grand Rapids | 1969 | 04050006 | Lower Grand | established |
| 1468837 | MI | Kent | Grand Rapids | 1891 | 04050006 | Lower Grand | established |
| 1468967 | MI | Ottawa | 5 mi. south of Ravenna | 1984 | 04050006 | Lower Grand | established |
| 1468972 | MI | Kent | Grand Rapids | 1895 | 04050006 | Lower Grand | established |
| 1469049 | MI | Kent | Vergennes Township | 1892 | 04050006 | Lower Grand | established |
Citation for this information:
U.S. Geological Survey, 2026,
Agrostis gigantea: U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov, Access Date: 1/17/2026