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Oak Tree Overview:
Oak is a hardwood tree in the genus Quercus.
– They have spirally arranged leaves with lobed edges.
Oak trees produce acorns.
– Belonging to the beech family.
– The genus Quercus is widely distributed.

Oak Tree Classification:
– Subgenus Cerris includes oak species.
– Subgenus Quercus contains various oak species.
– Sections Cerris, Cyclobalanopsis, Ilex, Lobatae, Ponticae, Protobalanus, Virentes are oak classifications.
– Quercus is a diverse genus with many sections.
– Refer to the list of Quercus species for more information.

Oak Tree Importance:
Oak trees are valuable for timber and furniture.
– They provide habitat and food for wildlife.
Oak wood is used in construction and wine barrels.
– Symbolize strength, endurance, and longevity.
Oak forests support biodiversity.

Oak Tree Characteristics:
Oak trees can live for hundreds of years.
– Some oak species are deciduous, while others are evergreen.
– Leaves vary in shape and size among oak species.
– Acorns are an essential food source for many animals.
Oak bark is thick and furrowed in mature trees.

Oak Tree Conservation:
– Deforestation threatens oak tree populations.
– Conservation efforts focus on preserving oak habitats.
– Climate change impacts oak tree distribution.
– Sustainable forestry practices are crucial for oak conservation.
– Public awareness and education aid in oak tree protection.

Oak (Wikipedia)

An oak is a hardwood tree or shrub in the genus Quercus of the beech family. They have spirally arranged leaves, often with lobed edges, and a nut called an acorn, borne within a cup. The genus is widely distributed in the Northern Hemisphere; it includes some 500 species, both deciduous and evergreen. Fossil oaks date back to the Middle Eocene. Molecular phylogeny shows that the genus is divided into Old World and New World clades, but many oak species hybridise freely, making the genus's history difficult to resolve.

Temporal range: Paleocene - Eocene boundary – recent 56–0 Ma possible Paleocene & Late Cretaceous records
Foliage and acorns of Quercus robur
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Fagales
Family: Fagaceae
Subfamily: Quercoideae
Genus: Quercus
Subgenera and sections

See also List of Quercus species.

Ecologically, oaks are keystone species in habitats from Mediterranean semi-desert to subtropical rainforest. They live in association with many kinds of fungi including truffles. Oaks support more than 950 species of caterpillar, many kinds of gall wasp which form distinctive galls, roundish woody lumps such as the oak apple, and a large number of pests and diseases. Oak leaves and acorns contain enough tannin to be toxic to cattle, but pigs are able to digest them safely. Oak timber is strong and hard, and has found many uses in construction and furniture-making. The bark was traditionally used for tanning leather. Wine barrels are made of oak; these are used for aging alcoholic beverages such as sherry and whisky, giving them a range of flavours, colours, and aromas. The spongy bark of the cork oak is used to make traditional wine bottle corks. Almost a third of oak species are threatened with extinction due to climate change, invasive pests, and habitat loss.

In culture, the oak tree is a symbol of strength and serves as the national tree of many countries. In Indo-European and related religions, the oak is associated with thunder gods. Individual oak trees of cultural significance include the Royal Oak in Britain, the Charter Oak in the United States, and the Guernica Oak in the Basque Country.

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