| Specimen ID | 259331 |
| Group | Plants |
| Genus | Egeria |
| Species | densa |
| Common Name | Brazilian waterweed |
| State | CA |
| County | Contra Costa |
| Locality | Bethel Island, W side of Franks Tract State Recreation Area |
| Mapping Accuracy | Accurate |
| HUC8 Name | San Joaquin Delta |
| HUC8 Number | 18040003 |
| HUC10 Name | Middle River-San Joaquin River |
| HUC10 Number | 1804000309 |
| HUC12 Name | Jersey Island-Taylor Slough |
| HUC12 Number | 180400030905 |
| Map | |
| Collection Day | 16 |
| Collection Month | 9 |
| Collection Year | 1960 |
| Year Accuracy | Actual |
| Potential Pathway | unknown |
| Status | established |
| Reference 1 |
| Ref. Number: | 10714 |
| Author: | Regents of the University of California |
| Date: | 2015 |
| Title: | Jepsen online interchange for California floristics. |
| Publisher: | University and Jepson Herbaria, University of California, Berkeley. |
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| Record Type | Literature |
| Earliest Record | locale |
| Museum Cat Number | UC1618316 |
| Verifier | |
| Freshwater/Marine | Freshwater |
