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Quaking Aspen Trees
Photograph by Roy Toft
Quaking aspen trees in California's Sierra Nevada Mountains are resplendent in shimmering foliage and white bark.
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Birch Bark
Photograph by Raul Touzon
Bark peels like paper from a birch tree in Acadia National Park, Maine.
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Eucalyptus Tree Bark
Photograph by Raul Touzon
Streaks of color paint the smooth bark of a eucalyptus tree in Miami, Florida.
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Knotted Aspen Bark
Photograph by Tom Murphy
Knots peer out from the bark of these North American aspen trees.
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Cottonwood Tree Bark
Photograph by Raymond Gehman
Deep furrows crease the bark of a cottonwood tree in Dinosaur Provincial Park, Alberta, Canada.
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Sycamore Bark
Photograph by Todd Gipstein
Multicolored scales mottle the bark of a sycamore tree near Lake Como, Italy.
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Whitebark Pine Trunks
Photograph by Tom Murphy
Age contorts the trunks of a group of whitebark pine trees in Yellowstone National Park.
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Termite Tunnels
Photograph by Raul Touzon
Termite tunnels scar a pair of tree trunks on St. John island in the Virgin Islands.
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Foxtail Pine
Photograph by Marc Moritsch
Weathered scales encase the trunk of a foxtail pine in California's Sierra Nevada Mountains.
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Aspen Grove
Photograph by Taylor Kennedy
Ranks of aspen trees crowd a dense grove outside Aspen, Colorado.
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