Tree is completely infested on nearly every branch. Second tree in the Barrie area found with this gall.
Hard Galls on Eastern Cottonwood tree averaged 35mm x 35mm.
On Eastern Cottowood. – https://www.inaturalist.org/observations/47762292
Gall on a poplar tree. The host tree was observed here: https://www.inaturalist.org/observations/51420093