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The holm oak is one of the top three trees used in the establishment of truffle orchards, or truffières. Truffles grow in an ectomycorrhizal association with the tree's roots. [16] Q. ilex can be clipped to form a tall hedge, and it is suitable for coastal windbreaks, in any well drained soil. It forms a picturesque rounded head, with ...
Quercus robur is a deciduous tree up to 40 metres (130 ft) tall, [5] with a single stout trunk that can be as much as 11 m (36 ft) in girth (circumference at breast height) or even 14 m (46 ft) in pollarded specimens. Older trees tend to be pollarded, with boles (the main trunk) 2–3 m (61⁄2 –10 ft) long. These live longer and become more ...
Quercus agrifolia, the California live oak, [3] or coast live oak, is an evergreen [4] live oak native to the California Floristic Province.Live oaks are so-called because they keep living leaves on the tree all year, adding young leaves and shedding dead leaves simultaneously rather than dropping dead leaves en masse in the autumn like a true deciduous tree. [5]
The acorn is the nut of the oaks and their close relatives (genera Quercus and Lithocarpus, in the family Fagaceae). It usually contains a seedling surrounded by two cotyledons (seedling leaves), enclosed in a tough shell known as the pericarp, and borne in a cup-shaped cupule. [1][2] Acorns are 1–6 cm (⁄ – 2⁄ in) long and 0.8–4 cm ...
Quercus sada Mast. Quercus rubra, the northern red oak, is an oak tree in the red oak group (Quercus section Lobatae). It is a native of North America, in the eastern and central United States and southeast and south-central Canada. It has been introduced to small areas in Western Europe, where it can frequently be seen cultivated in gardens ...
The Seven Sisters Oak, estimated to be between 500 and 1,000 years old, is the largest certified southern live oak tree. The Angel Oak on Johns Island, South Carolina, near Charleston is estimated to be 400–500 years old. It has a trunk circumference of 8.5 m (28 ft), height of 20.3 m (66 ft 6 in) and limb spread of 57 m (187 ft).
Quercus garryana is an oak tree species of the Pacific Northwest, with a range stretching from southern California to southwestern British Columbia. [3] It is commonly known as the Garry Oak, Oregon white oak or Oregon oak. It grows from sea level to an altitude of 690 feet (210 metres) in the northern part of its range, and from 980 to 5,900 ...
Quercus gambelii, with the common name Gambel oak, is a deciduous small tree or large shrub that is widespread in the foothills and lower mountains of western North America. It is also regionally called scrub oak, oak brush, and white oak. [4][5] The common and scientific names, Gambel oak and Quercus gambelii, were named after the American ...