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
Royal Oak, Calgary Royal Oak, Calgary Royal Oak is a residential neighbourhood in the north-west quadrant of Calgary, Alberta. It is located close to the north-western edge of the city and is bounded to the north by Country Hills Boulevard, to the east by Stoney Trail, to the south by Crowchild Trail and to the west by Rocky Ridge Road. Royal Oak is located near Rocky Ridge, Calgary The land was annexed to the City of Calgary in 1989 (from the Municipal District of Rocky View), and Royal Oak was established in 1998. It is represented in the Calgary City Council by the