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, Michigan year since 1976 as a result of the city's commitment to tree planting and preservation. The Gilda Radner Hereditary Cancer Program is a foundation set up by Detroit-area native Gilda Radner, who is known for her work as a comedian of "Saturday Night Live". In 1998 the Program created a free cancer support community for people with cancer, their families, and friends. Gilda's Club Metro Detroit operates a three-story non-residential house in Royal Oak. It has served more than 3,000 members for social and emotional support through a variety of activities. Major employers in Royal Oak include William Beaumont Hospital