| Specimen ID | 1420950 |
| Group | Plants |
| Genus | Alternanthera |
| Species | philoxeroides |
| Common Name | alligatorweed |
| State | VA |
| County | Southampton |
| Locality | Blackwater River, E of Daniels Drive |
| Mapping Accuracy | Accurate |
| HUC8 Name | Blackwater |
| HUC8 Number | 03010202 |
| HUC10 Name | Kingsale Swamp-Blackwater River |
| HUC10 Number | 0301020205 |
| HUC12 Name | Union Camp Holding Pond-Blackwater River |
| HUC12 Number | 030102020505 |
| Map | |
| Collection Day | 15 |
| Collection Month | 10 |
| Collection Year | 2017 |
| Year Accuracy | Actual |
| Potential Pathway | hitch hiker on small watercraft |
| Status | established |
| Reference 1 |
| Ref. Number: | 30723 |
| Author: | Cowles, S. |
| Date: | 2017 |
| Title: | Destructive river weed found in Blackwater |
| Publisher: | The Tidewater News |
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| Comments | Spotted for three years prior to verification. |
| Record Type | Personal communication |
| Earliest Record | drainage |
| Verifier | Byron Carmean |
| Freshwater/Marine | Freshwater |
