A genus of majestic trees with a rounded or conical crown and brown-grey bark. The leaves are deciduous or semi-evergreen depending on the variety, and their shape, color, and size also vary accordingly. The flowers are grouped in hanging catkins and are golden yellow or yellow-green. The fruits are acorns, which differ in shape and size depending on the variety, as do their cultivation requirements. These trees are usually planted in parks, along avenues, and in medium to large gardens. Notable varieties include the Turkey oak, scarlet oak, Hungarian oak, holm oak, and pedunculate oak.