Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
35168
| MD | | Blue Ridge, ridge and valley, Great Valley | 1976 |
02070009
| Monocacy | established |
35166
| MD | | coastal plain portion of the Delmarva | 1976 |
02080110
| Tangier | established |
35167
| MD | | western slope of the Piedmont (Potomac drainage) | 1976 |
02070000
| Potomac | established |
268189
| MD | | Upper Chesapeake (HUC6) non-specific | 1981 |
02060000
| Upper Chesapeake | established |
1700643
| MD | Anne Arundel | [No locality description provided] | 2017 |
02060003
| Gunpowder-Patapsco | |
1674147
| MD | Anne Arundel | Severna Park, MD, USA | 2019 |
02060004
| Severn | |
547942
| MD | Charles | Zekiak Swamp Run | 1998 |
02070011
| Lower Potomac | established |
547944
| MD | Frederick | Monocacy River, Thurmont, Md. | 1998 |
02070009
| Monocacy | established |
268190
| MD | Frederick | Western Maryland, drainages in the Piedmont and Blue Ridge regions | 1981 |
02070009
| Monocacy | established |
547943
| MD | Prince George's | Cash Lake Patuxent Refuge | 1947 |
02060006
| Patuxent | established |