Quercus prinoides
Stem galls, detachable
Cluster like Adleria dimorpha but on twig in Sept-Oct; light colored, wrinkle in drying, dropping in fall.
- LH Weld: (1959) Cynipid galls of the eastern United States©
Reference: https://www.biodiversitylibrary.org/item/273718#page/82/mode/1up