Crataegus oxycantha, commonly known as hawthorn or thornapple, is a small deciduous tree or shrub that belongs to the rose family. The word "hawthorn" comes from the Old English term "hagaþorn," which means "hedgethorn" or "thorny hedge." This plant is popularly used in traditional medicine for treating various ailments such as high blood pressure, indigestion, and anxiety. Some of the synonyms for Crataegus oxycantha include Mayflower, whitethorn, quickthorn, hawberry, and mayblossom. These synonyms all refer to various aspects of the plant, such as its flowers, fruits, and thorns, and are used interchangeably in literature and scientific research.