| Specimen ID | 1884215 |
| Group | Plants |
| Genus | Trapa |
| Species | bispinosa |
| Variety | iinumai |
| Common Name | water chestnut |
| State | VA |
| County | Fairfax |
| Locality | Federal Systems Park pond [site code RAD-VA] |
| Mapping Accuracy | Accurate |
| HUC8 Name | Middle Potomac-Anacostia-Occoquan |
| HUC8 Number | 02070010 |
| HUC10 Name | Bull Run |
| HUC10 Number | 0207001007 |
| HUC12 Name | Cub Run |
| HUC12 Number | 020700100704 |
| Map | |
| Collection Day | 29 |
| Collection Month | 7 |
| Collection Year | 2025 |
| Year Accuracy | Actual |
| Status | established |
| Comments | Thousands of old seeds ring this pond. Google aerial photo map (accessed July 2025) shows plants on water surface - looks like Trapa w/ 35 percent abundance. The owner must be treating it now (summer 2025), as I saw few rosettes (less than 1 percent abundance). |
| Record Type | NAS sighting report |
| Verifier | Ian Pfingsten |
| Year Class | Fruit |
| Photo | |
