Gall on goldenrod
Gall on goldenrod
This is a picture of Procecidochares atra on goldenrod at the Pickering Creek Audubon Center near Easton, Maryland.
I don't know what made these galls. There are flies, moths, midges and others. They're all insects, so that's the ID I'm using.
I believe the plant is a flat-top white aster.