Round gall on a fallen oak leaf. There are many of these to be found in the woods.
No interactions present.
RHoman, I looked it up and of course you are right about that. Thanks.
I have always wondered what these are. Can anyone elaborate please
The gall is an excessive amount of growth at a particular point on the plant, caused by the presence, in this case, of an insect larva. The larva stimulates the plant into producing an abundance of cells which provide the larva with a food supply and a fairly safe home.
Lat/Lng: 51.3728, 0.013
OS grid ref: TQ402656