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Sunlight and light shadows on autumn oak leaves.

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A red leaf gall on a spring elm leaf.

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Water beads on ash tree leaves after a spring rain.

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Water beads on ash tree leaves after a spring rain.

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A winter rose bush leaf is highlighted by the maroon siding of a nearby building in Ankeny, Iowa.

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A fallen autumn oak leaf lies along the Rothchild Nature Trail in West Des Moines, Iowa.

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Autumn ash leaves.

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Sunlight and shadow patterns highlight a summer leaf in Southwoods Park, West Des Moines, Iowa.

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A branch of summer oak leaves highlighted by sun and shadow in West Des Moines, Iowa.

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Elm leaves in sunlight and shadow, West Des Moines, Iowa.

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Five autumn leaves shown on a black background.

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A brown autumn elm leaf shown on a black background.

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A found October autumn oak leaf with a black background.

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Sunlight and shadow highlight leaves along the High Trestle Trail in Ankeny, Iowa.

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An autumn maple leaf from Raccoon River Park, West Des Moines, Iowa, on a black background.

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An autumn oak leaf found along the Jordan Creek Bike Trail in West Des Moines, Iowa.

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An autumn oak leaf found along the Jordan Creek Bike Trail in West Des Moines, Iowa.

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Autumn ash leaves on a black background.

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A palm leaf in shadows, Des Moines, Iowa.

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A fallen brown autumn leaf lays on an asphalt path, Southwoods Park, West Des Moines, Iowa.

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A brown autumn leaf in Southwoods Park, West Des Moines, Iowa.

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Spring leaves along the bike trail in Southwoods Park, West Des Moines, Iowa

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Spring tree leaves against an out of focus forest background, Southwoods Park, West Des Moines, Iowa