A large, irregularly globose, mealy-white swelling on the leaves of Rosa carolina. The one gall to have been dissected has been ID'd as Diplolepis sp., very probably D. ignota. See https://www.inaturalist.org/observations/232757723. These white galls are easy to misidentify, because they resemble Exobasidium galls (although Exobasidium does not use Rosaceae as hosts). So it seems best to retain this page on Gallformers.
”- Gallformers Contributors: (2024) Gallformers ID Notes©