2015
NZ1565 : Spangle galls on oak leaf
taken 10 years ago, near to Throckley, Newcastle Upon Tyne, England

Spangle galls on oak leaf
There is a description here NS3878 : Common spangle galls on oak
Up to 100 spangle galls can develop on the underside of each leaf and therefore vast numbers fall onto the ground in September, sometimes completely colouring and covering the ground. Infestations do not have any serious effect upon galled trees.
Link
Up to 100 spangle galls can develop on the underside of each leaf and therefore vast numbers fall onto the ground in September, sometimes completely colouring and covering the ground. Infestations do not have any serious effect upon galled trees.
Link
