Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
259126
| CA | Contra Costa | Pittsburg Marina | 1991 |
18050001
| Suisun Bay | collected |
1437403
| CA | Contra Costa | Pittsburg Marina | 1991 |
18050001
| Suisun Bay | established |
229028
| IA | Page | Page County | 1991 |
10240000
| Missouri-Nishnabotna | established |
235112
| MA | Worcester | Lancaster town, W bank of Nashua River ca. 0.1 mi S of MA Rt. 2 in Area 13A | 1991 |
01070004
| Nashua River | collected |
229612
| MN | | state non-specific | 1991 |
| | established |
1336120
| MO | Crawford | In wet soil along Huzzah Creek S of Reis Biological Station | 1991 |
07140102
| Meramec | unknown |
1336129
| MO | Miller | Slough on N side of light duty road to Bagnell Dam opposite entrance to public access 2 clumps naturalized on N side of slough access | 1991 |
10290111
| Lower Osage | unknown |
853292
| OR | Jackson | Eagle Point | 1991 |
17100308
| Middle Rogue | established |
234484
| WA | Lewis | Onalaska, along Newaukum River bank | 1991 |
17100103
| Upper Chehalis | established |
1526516
| WA | Spokane | Long Lake (Reservoir) | 1991 |
17010307
| Lower Spokane | established |
230561
| WA | Stevens | Long Lake (Reservoir) | 1991 |
17010307
| Lower Spokane | established |