SK53

On the Turkey Oak on Arbour Hill:

* Andricus grossulariae. Old catkin galls from the Spring. Causer is a gall wasp.
* Aceria cerrea : a bulge in the leaf with a corresponding hairy patch beneath, caused by a mite, Aceria cerrea.

@fowp

A cluster of brown, almost globular, galls on a Turkey Oak twig.
A Turkey Oak leaf with a number of bulges. The bulges are abnormally hairy underneath. Caused by Aceria cerrea, a mite.
Sep 17, 2024, 06:56 AM·Public
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