Found out what AI couldn’t : knopper gall wasp galls

Went back to the park today and found more of these strange seed pods (I now know they aren t seed pods). I examined all the trees around, but nothing came up that I could link to these things. Only Oaks, Beeches, Tilia, Cypresses, Cherry Laurel, They re galls from a wasp named Andricus quercuscalicis which [ ]