Oak apple due to the superficial resemblance and the preponderance of the oak marble gall in the wild. Other galls found on oak trees include the oak artichoke gall and the acorn cup gall, but each of these has its own distinctive form. Some common oak-apple-forming species are the "Biorhiza pallida" gall wasp in Europe, "Amphibolips confluenta" in eastern North America, and "Atrusca bella" in western North America. Oak apples may be brownish, yellowish, greenish, pinkish, or reddish. Oak galls have been used in the production of ink since at least the time of the Roman Empire. From the Middle Ages to
Oak Apple Day turn-out every year. At All Saints' Church, Northampton, a statue of Charles II is garlanded with oak leaves at noon every Oak Apple Day, followed by a celebration of the Holy Communion according to the "Book of Common Prayer". Oak Apple Day is also celebrated in the Cornish village of St Neot. The vicar leads a procession through the village, he is followed by the Tower Captain holding the Oak bough. A large number of the villagers follow walking to the Church. A story of the history of the event is told and then the vicar blesses the branch. The