| Specimen ID | State | County | Locality | Year | HUC Number | Drainage Name | Status |
| 246466 | NY | Tompkins | Tompkins County | 2008 | 04140201 | Seneca | collected |
| 240735 | NY | | Lake Ontario | 1922 | 04280002 | Lake Ontario | established |
| 279713 | NY | Tompkins | Cayuga Lake, Ithaca | 1922 | 04140201 | Seneca | established |
| 279714 | MI | Houghton | Hancock, MI | 1936 | 04020103 | Keweenaw Peninsula | established |
| 1456565 | MI | Houghton | Hancock, MI | 1936 | 04020103 | Keweenaw Peninsula | established |
| 1457487 | MI | Houghton | Hancock, MI | 1937 | 04020103 | Keweenaw Peninsula | unknown |
| 1457488 | MI | Houghton | Hougton | 1958 | 04020103 | Keweenaw Peninsula | unknown |
| 1457489 | MI | Houghton | Hougton | 1940 | 04020103 | Keweenaw Peninsula | unknown |
| 1457490 | MI | Houghton | Hancock, MI | 1973 | 04020103 | Keweenaw Peninsula | unknown |
| 1457491 | MI | Allegan | Gilligan Lake, W shore, SE 1/4 sect. 16 T4N R16W, ca. 5 mi. N of Saugatuck. | 1999 | 04050002 | Black-Macatawa | unknown |
| 246467 | NY | Oneida | Oneida County | 2008 | 04140202 | Oneida | collected |
Citation for this information:
U.S. Geological Survey, 2025,
Juncus inflexus: U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov, Access Date: 12/19/2025