Oak apple 29 May that commemorated the Restoration of Charles II in 1660. The popular name refers to the event during the English Civil War when Charles hid in an oak tree. The commemoration persists in some areas today, although festivities have little to do with the Restoration. Oak apple Oak apple or oak gall is the common name for a large, round, vaguely apple-like gall commonly found on many species of oak. Oak apples range in size from in diameter and are caused by chemicals injected by the larva of certain kinds of gall wasp in the family Cynipidae. The adult
Royal Oak three hundred year-old descendant of the original and is thus known as 'Son of Royal Oak'. In 2000, Son of Royal Oak was badly injured during a violent storm and lost many branches. In September 2010, it was found to have developed large and dangerous cracks. Since 2011 the tree has been surrounded by a outer perimeter fence to ensure the safety of visitors. Three third generation descendants of the Royal Oak have been ceremonially planted nearby: Saplings, certified as grown from the Son's acorns, are available from the English Heritage shop at Boscobel House. In commemoration of the tree's