Bare Branched Mighty Oak In Sepia Tone Dark Stock Image

An oak is a tree or shrub in the genus Quercus of the beech family, Fagaceae. Oaks have spirally arranged leaves, with lobate margins in many species; some have serrated leaves or entire leaves with smooth margins. In spring, a single oak tree produces both male flowers in the form of catkins and small female flowers, meaning that the trees are monoecious. The fruit is a nut called an acorn or oak nut borne in a cup-like structure known as a cupule; each acorn contains one seed.