Andricus inflator f. agamic

Agamic galls are formed in buds and are green, smooth and rounded with a small point.  They are quite large at up to 6mm diameter.  Bud scales are present at the base of the gall, but eventually may fall off.  Eventually the galls drop out of the bud, leaving a scar surrounded by the remains of the scales.

Similar galls in oak buds are formed by other Andricus species

Photograph the gall on oak, and note the host species

native oaks

Locally common (British Plant Galls, Redfern & Shirley, 2023)

occasional; possibly under-recorded

British Plant Galls (Redfern & Shirley, 2023)