Friday, February 24, 2017

Austrian Pine - Pinus nigra

The Austrian Pine, Pinus nigra (also called the European Black Pine) is a medium sized evergreen that reaches heights of 60 feet tall and 2 feet in diameter.  Similar to the Eastern White Pine and Red Pine, each year it grows a set of limbs in a whorled pattern around the trunk that resemble spokes on the hub of a wheel.  The limbs of the Austrian Pine form a large, thick, pyramidal crown that is filled with dark green needle-like foliage.  This variety was one of the first trees introduced into the United States, often planted by homesteaders in the treeless Great Plains for protection from the sun, wind and snow.   Native to Europe the Austrian Pine was first imported in the eighteenth century and has been widely planted as an ornamental through the middle and eastern United States.  It's tolerance to salt and sulfur dioxide damage make it popular as an Urban Tree as well.



Image Citation: Robert Vid├ęki, Doronicum Kft., Bugwood.org

In the Northern United States the Austrian Pine is often confused with the native Red Pine as they are similar in appearance, though the trained eye is able to distinguished between the two by inspecting the bark color.  The evergreen needles range in size from 3-6 inches long and are bundled in sets of two.  The needles are slender, shiny, stiff and dark blue-green in color.  The cones are egg shaped and 2-3 inches in length at maturity.  When the cones open and shed their seeds, they remain on the tree for several years before eventually falling from the tree.  The bark of the trunk is a dark gray to dull/dark brown with a thin surface of flat plates that thicken with age.



Image Citation: Paul Wray, Iowa State University, Bugwood.org

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