| Impact ID | 9903 |
| Impact Type | Genetic |
| Study Type | Observational |
| Study Location | Field |
| Impact Description | Hybrid strains of Vallisneria spiralis and V. denseserrulata were found in south and central Florida as well as in northern Alabama. |
| Reference | 42664 |
| Great Lakes Region | No |
| Cost | |
| Location | Florida and Alabama |
