Submitter does not have a specimen
I’ve spotted a patch of what I believe is yellow flag iris growing just off the western roadside of Hwy 101. It appears to be yellow flag iris, but I have not seen it during bloom so I can’t be 100% sure. The patch is growing on the edge of the saltmarsh area near some alders along the highway. It is easiest to see the patch when driving south on Hwy 101.