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They are dark green and shiny on the top while the underside is a paler gray-green with fine hairs. In autumn, leaf color varies between red, yellow, and brown. Like other oak trees, the overcup oak has clustered terminal buds. [6] The bark is light to dark gray in color with irregular bark plates. Its bark plates are deeply ridged and furrowed ...
It commonly lives more than 500 years and occasionally more than 1,200 years. The bark on young trees is thin, smooth, gray, and covered with resin blisters. On mature trees, it is moderately thick (3–6 cm, 1 + 1 ⁄ 4 – 2 + 1 ⁄ 4 in), furrowed and corky though much less so than coast Douglas-fir. Foliage
Beech bark disease is a disease that causes mortality and defects in beech trees in the eastern United States, Canada and Europe. [ 1 ] [ 2 ] [ 3 ] In North America , the disease occurs after extensive bark invasion by Xylococculus betulae and the beech scale insect , Cryptococcus fagisuga . [ 4 ]
Quercus acutissima is a medium-sized deciduous tree growing to 25–30 metres (82–98 feet) tall with a trunk up to 1.5 m (5 ft) in diameter. The bark is dark gray and deeply furrowed. The leaves are 8–20 centimetres ( 3 + 1 ⁄ 4 – 7 + 3 ⁄ 4 inches) long and 3–6 cm ( 1 + 1 ⁄ 4 – 2 + 1 ⁄ 4 in) wide, with 14–20 small saw-tooth ...
The leaves are 7–15 cm (2 + 3 ⁄ 4 –6 in) long and 5–13 cm (2–5 in) broad, variable in shape, with a lobed margin. Most often, the basal two-thirds is narrower and deeply lobed, while the apical third is wider and has shallow lobes or large teeth. They usually do not show strong fall color, although fine golden hues are occasionally ...
The disease is caused by a fungus, Cryptostroma corticale. Normally, the fungus grows in dead wood as part of the normal decaying process. But the fungus has been increasingly found in living trees.
The leaves are thick with a waxy texture, elliptical, 7 to 15 cm (2 + 3 ⁄ 4 to 6 in) long and 4 to 8 cm (1 + 1 ⁄ 2 to 3 + 1 ⁄ 4 in) broad, arranged spirally; they are glossy dark green above and a lighter, more grayish green beneath, with an entire margin. The leaves are evergreen, lasting a few years before detaching
The leaves of the black oak are alternately arranged on the twig and are 10–20 cm (4–8 in) long with 5–7 bristle-tipped lobes separated by deep U-shaped notches. The upper surface of the leaf is a shiny deep green, and the lower is yellowish-brown. There are also stellate hairs on the underside of the leaf that grow in clumps. [5]
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