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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 ]
The bark on young trees is thin, smooth, grey, and contains numerous resin blisters. On mature trees, usually exceeding 80 years, [ citation needed ] it is very thick and corky, growing up to 36 cm (14 in) thick with distinctive, deep vertical fissures caused by the gradual expansion of the growing tree.
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Subspecies incana near Rockhampton. Casuarina equisetifolia, commonly known as coastal she-oak, horsetail she-oak, [3] ironwood, [4] beach sheoak, beach casuarina, whistling tree [5] or Australian pine [6] is a species of flowering plant in the family Casuarinaceae and is native to Australia, New Guinea, Southeast Asia and India.
The bark is smooth and greenish-grey, becoming shallowly fissured in all old trees. The leaves are alternate, 3–12 centimeters (1 + 1 ⁄ 4 – 4 + 3 ⁄ 4 in) long, with prominent veins giving a distinctive corrugated texture, and a serrated margin. The male and female catkins appear in spring at the same time
E. crebra bark. Ironbark is a common name of a number of species in three taxonomic groups within the genus Eucalyptus that have dark, deeply furrowed bark. [1]Instead of being shed annually as in many of the other species of Eucalyptus, the dead bark accumulates on the trees, forming the fissures.
Trees have natural chemicals that keep most fungi at bay, but climate change could be making trees more vulnerable, researcher says. Citizen scientists to study this tree disease found in ...
The bark is 5 centimetres (2 inches) thick, reddish to gray (but purple within), furrowed, and divided into slender plates. [4] The leaves are needle-like, flattened, 3–6 cm ( 1 + 1 ⁄ 8 – 2 + 3 ⁄ 8 in) long and 2 millimetres ( 3 ⁄ 32 in) wide by 0.5 mm thick, glossy dark green above, [ 4 ] with two green-white bands of stomata below ...
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