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  1. Oak
    OakGenus of plants
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    https://en.wikipedia.org › wiki › Oak

    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 … See more

    Why Oaks are Awesome
    Why Oaks are Awesome
    A History of Biodiversity
    A History of Biodiversity
    Etymology

    The generic name Quercus is Latin for "oak", derived from Proto-Indo-European *kwerkwu-, "oak", which is also the origin of the name "fir", another important or sacred tree in Indo-European culture. The word "cork", for t… See more

    Description

    Oaks are hardwood (dicotyledonous) trees, deciduous or evergreen, with spirally arranged leaves, often with lobate margins; some have serrated leaves or entire leaves with smooth margins. Many deciduous species are … See more

    Distribution

    The genus Quercus is native to the Northern Hemisphere and includes deciduous and evergreen species extending from cool temperate to tropical latitudes in the Americas, Asia, Europe, and North Africa. North Amer… See more

    Evolution

    Potential records of Quercus have been reported from Late Cretaceous deposits in North America and East Asia. These are not considered definitive, as macrofossils older than the Paleogene, and possibly from before the … See more

    Ecology

    Oaks are keystone species in a wide range of habitats from Mediterranean semi-desert to subtropical rainforest. They are important components of hardwood forests; some species grow in associations with members of the … See more

    Toxicity

    The leaves and acorns of oaks are poisonous to livestock, including cattle and horses, if eaten in large amounts, due to the toxin tannic acid, which causes kidney damage and gastroenteritis. An exception is the … See more

    Uses

    Oak timber is a strong and hard wood with many uses, such as for furniture, floors, building frames, and veneers. The wood of a red oak Quercus cerris (the Turkey oak) has better mechanical properties than those of th… See more

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