| Specimen ID | 1650636 |
| Group | Plants |
| Genus | Hydrilla |
| Species | verticillata |
| Subspecies | verticillata |
| Common Name | whorled hydrilla |
| State | TX |
| County | Harrison |
| Locality | Big Cypress Bayou, Karnack, TX, US |
| Mapping Accuracy | Accurate |
| HUC8 Name | Caddo Lake |
| HUC8 Number | 11140306 |
| HUC10 Name | Big Cypress Bayou-Frontal Caddo Lake |
| HUC10 Number | 1114030604 |
| HUC12 Name | Kitchen Creek-Frontal Caddo Lake |
| HUC12 Number | 111403060407 |
| Map | |
| Collection Day | 27 |
| Collection Month | 8 |
| Collection Year | 2019 |
| Year Accuracy | Actual |
| Potential Pathway | hitch hiker on small watercraft |
| Status | established |
| Reference 1 |
| Ref. Number: | 25944 |
| Author: | iNaturalist |
| Date: | 2024 |
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| Comments | iNaturalist observation ID: 31639487 |
| Record Type | Literature |
| Verifier | NAS Program Staff |
| Freshwater/Marine | Freshwater |
