| Specimen ID | 236344 |
| Group | Plants |
| Genus | Egeria |
| Species | densa |
| Common Name | Brazilian waterweed |
| State | OR |
| County | Columbia |
| Locality | Columbia River, lower |
| Mapping Accuracy | Approximate |
| HUC8 Name | Lower Columbia-Clatskanie |
| HUC8 Number | 17080003 |
| Map | |
| Collection Day | 15 |
| Collection Month | 11 |
| Collection Year | 2005 |
| Year Accuracy | Estimated |
| Potential Pathway | hitch hiker on small watercraft |
| Status | established |
| Reference 1 |
| Ref. Number: | 15921 |
| Author: | Many. |
| Date: | 2005 |
| Title: | Map of South American waterweed (Egeria densa) distribution in Oregon. |
| Publisher: | WeedMapper Team, Department of Rangeland Ecology & Managment, Oregon State University. |
| Volume: | 2005 |
| Issue: | November |
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| Comments | Noted as abundant on the Oregon side of the lower Columbia River. |
| Record Type | Literature |
| Freshwater/Marine | Freshwater |
