Don't ask me how many elderberry plants I inspected in multiple locations. Doesn't appear to be common. Last photo shows the gall that I opened. Exit hole visible in photo series. Museum complex area in town of Opelousas.
On Baccharis halimifolia. Near bayou and boat launch area. Town of Washington, LA
Bluebonnet Swamp Nature Center
Bluebonnet Swamp Nature Center