On Red oak group tree.
Hidden cells in Lactuca sp. stem (probably biennis). Collected.
Perhaps? Emerged from https://www.inaturalist.org/observations/203528406 but greatly outnumbered by D. rosae (maybe 10 to 1) @earley_bird
Date represents date of gall collection
This is a picture of Diastrophus cuscutaeformis on the North Tract of the Patuxent Research Refuge near Fort Meade, Maryland.