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Columnar trees are shaped like columns or cylinders, with branches of uniform length -- top to bottom. They aren't necessarily narrow, but they appear to be because of the branching pattern. Many commonly known trees are available in columnar versions.
Examples: cherry, European hornbeam, Lombardy poplar, red maple, quaking aspen, sugar maple, tuliptree
The branching pattern of theses trees is irregular and random, creating an open, asymmetrical canopy shape. They offer wonderful shade, and after their leaves fall, their branch architecture creates dramatic silhouettes against a winter sky.
Examples: ash, buckeye, catalpa, hickory, pawpaw, sycamore (London Plane), silver maple, smoketree
These broad, cone-shaped trees have triangular canopies -- wider at the base and narrower toward the top. Many deciduous trees and conifers have this classic shape. The large ones are stunning on properties where they have room to grow.
Examples: American beech, American holly, baldcypress, blue spruce, cucumber magnolia, fir, linden, oak (pin and scarlet), sweetgum
The canopies of these trees -- with their regular, rounded shape -- are ideal for formal landscapes. Stately rows provide a strong linear feature, softened by the billow of their canopies. When alone on a spacious lawn, they make handsome specimens.
Examples: American hornbeam, American yellowwood, bur oak, black maple, flowering dogwood, hackberry, redbud
These trees have an elongated, narrow, tapering profile and a strong vertical habit that draws the eye upward. When planted in rows, they serve beautifully as hedges to define boundaries, as windbreaks, and as effective screens against noise or undesirable views.
Examples: Arborvitae, baldcypress, European beech, ginko
Trees that have vase-shaped canopies work well near streets and walks because they don't block the view of traffic or pedestrians. Branches grow at a sharp upward angle from the trunk, flaring outward at the tips. Canopies resemble upside-down triangles.
Examples: Boxelder, elm, fringetree, hawthorn, striped maple, zelkova
With strongly horizontal branches, even at the top of the canopy, these trees seem very wide. Usually massive, they overwhelm small properties and can dwarf single-story homes. But their spreading habit contrasts well with a narrow house.
Examples: Beech, Eastern redcedar, fir, honeylocust, hornbeam, Korean dogwood, larch, oak (red, white), witchhazel
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