The Major Oak is a large English oak near the village of Edwinstowe in the midst of Sherwood Forest, Nottinghamshire, England. According to local folklore, it was Robin Hood's shelter where he and his merry men slept. It weighs an estimated 23 tons, has a girth of 33 feet, a canopy of 92 feet, and is about 800–1,000 years old. In 2014, it was voted 'England's Tree of the Year' by a public poll by the Woodland Trust, receiving 18% of the votes. Its name originates from Major Hayman Rooke's description of it in 1790.

Quercus robur, the pedunculate oak, is a species of flowering plant in the beech and oak family, Fagaceae. It is a large tree, native to most of Europe and western Asia, and is widely cultivated in other temperate regions. It grows on soils of near neutral acidity in the lowlands and is notable for its value to natural ecosystems, supporting a very wide diversity of herbivorous insects and other pests, predators and pathogens.