| Specimen ID | 232121 |
| Group | Plants |
| Genus | Hydrilla |
| Species | verticillata |
| Subspecies | peregrina |
| Common Name | wandering hydrilla |
| State | MD |
| County | Carroll |
| Locality | Piney Run Reservoir |
| Mapping Accuracy | Accurate |
| HUC8 Name | Gunpowder-Patapsco |
| HUC8 Number | 02060003 |
| HUC10 Name | South Branch Patapsco River |
| HUC10 Number | 0206000310 |
| HUC12 Name | Piney Run |
| HUC12 Number | 020600031003 |
| Map | |
| Collection Month | 2 |
| Collection Year | 1998 |
| Year Accuracy | Actual |
| Potential Pathway | unknown |
| Status | established |
| Freshwater/Marine | Freshwater |
