| Specimen ID | 1401271 |
| Group | Plants |
| Genus | Hydrilla |
| Species | verticillata |
| Subspecies | verticillata |
| Common Name | whorled hydrilla |
| State | AR |
| County | Montgomery |
| Locality | Lake Ouachita, SW portion, Joplin Campgrounds, Mountain Harbor Rd |
| Mapping Accuracy | Accurate |
| HUC8 Name | Ouachita Headwaters |
| HUC8 Number | 08040101 |
| HUC10 Name | South Fork Ouachita River-Lake Ouachita |
| HUC10 Number | 0804010104 |
| HUC12 Name | Gap Creek-Lake Ouachita |
| HUC12 Number | 080401010404 |
| Map | |
| Collection Day | 1 |
| Collection Month | 2 |
| Collection Year | 2003 |
| Year Accuracy | Actual |
| Potential Pathway | hitch hiker on small watercraft |
| Status | established |
| Reference 1 |
| Ref. Number: | 29018 |
| Author: | Gentry, J.L. (director and curator). |
| Date: | 2013 |
| Title: | University of Arkansas Herbarium (UARK) |
| Publisher: | University of Arkansas |
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| Comments | Associated species: Egeria densa and Myriophyllum spicatum |
| Record Type | Specimen |
| Disposal | UARK |
| Museum Cat Number | 49981 |
| Verifier | Ian Pfingsten |
| Freshwater/Marine | Freshwater |
