Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
1668932
| MD | Montgomery | C&O Canal Natl. Park, Potomac River, just below Sherwin Isl. | 2010 |
02070008
| Middle Potomac-Catoctin | unknown |
1668605
| MD | Montgomery | Great Falls of Maryland Campus | 1917 |
02070008
| Middle Potomac-Catoctin | unknown |
1668603
| MD | Montgomery | Plummer's Island C. & O. Canal | 1915 |
02070008
| Middle Potomac-Catoctin | unknown |
1658695
| MD | Montgomery | Plummer's Island C. & O. Canal | 1983 |
02070008
| Middle Potomac-Catoctin | unknown |
1668955
| MD | Montgomery | Plummer's Island; south of Barton Houses C. & O. Canal | 1928 |
02070008
| Middle Potomac-Catoctin | unknown |
1667992
| MD | Montgomery | Potomac River Gorge, Plummers Isl., west end swale | 2017 |
02070008
| Middle Potomac-Catoctin | unknown |