| Specimen ID | 231932 |
| Group | Plants |
| Genus | Hydrilla |
| Species | verticillata |
| Subspecies | verticillata |
| Common Name | whorled hydrilla |
| State | TX |
| County | Hays |
| Locality | San Marcos River |
| Mapping Accuracy | Approximate |
| HUC8 Name | San Marcos |
| HUC8 Number | 12100203 |
| Map | |
| Collection Month | 7 |
| Collection Year | 1999 |
| Year Accuracy | Actual |
| Potential Pathway | unknown |
| Status | established |
| Reference 1 |
| Ref. Number: | 10689 |
| Author: | Doyle, R.D., P. Power, and K. Kennedy. |
| Date: | 1999 |
| Title: | Protecting the Native Aquatic Plant Communities of the Comal and San Marcos Rivers, TX |
| Pages: | 17 |
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| Record Type | Literature |
| Freshwater/Marine | Freshwater |
