Category hierarchy: Environmental Topics | Human Impact | Introduced SpeciesDescription: Flowers of the yellow flag iris in a seasonally inundated swamp at the mouth of an estuary on the western shore of the Potomac River.Capture device: Camera: Canon EOS D30 SLR digitalCapture details: Lens: Canon compact macro 50 mmLocality: Latitude: 3.885150000000000e+001; Longitude: -7.729819999999999e+001