On Black Cottonwood
See the plant https://www.inaturalist.org/observations/14175460
See the Galling agent's parasite https://www.inaturalist.org/observations/14297385
Gall on common snowberry (Symphoricarpos albus)
Gall on common snowberry (Symphoricarpos albus)
Gall on black cottonwood (Populus trichocarpa)
On Quercus kellogii