"Gall, or Oak-apple, produced by Cynips quercus-inanis, showing the internal cobwebby structure. Gall: a vegetable excrescence produced by the deposit of the egg of an insect in the bark or leaves of a plant, ordinarily to to the action of some virus deposited by the female along with the egg, but often to the irritation of the larva." -Whitney, 1911

Oak Apple Gall

"Gall, or Oak-apple, produced by Cynips quercus-inanis, showing the internal cobwebby structure. Gall:…