Evolution photos

Evolution photos

Evolution photos

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Shumard oak buds

Shumard oak buds

Sweetgum flowers

Sweetgum flowers

Seaside alders and Blue River, Oklahoma

Seaside alders and Blue River, Oklahoma

Cephalanthus flowers

Cephalanthus flowers

Sugar maples in Oklahoma

Sugar maples in Oklahoma

Crinoid fossils in Oklahoma

Crinoid fossils in Oklahoma

Bottomland flooded forest in Oklahoma

Bottomland flooded forest in Oklahoma

Oenothera rhombipetala in Oklahoma

Oenothera rhombipetala in Oklahoma

Bristlecone pine wood layers

Bristlecone pine wood layers

Ancient bristlecone pines

Ancient bristlecone pines

Darwin and Mt. Darwin

Darwin and Mt. Darwin

Darwin in Darwin

Darwin in Darwin

Fremontia in the Sierra Nevada

Fremontia in the Sierra Nevada

Mt. Whitney from the east

Mt. Whitney from the east

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Oenothera rhombipetala in Oklahoma

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Oenothera rhombipetala in Oklahoma

Along Arkansas River near Tulsa. Photo 2013 by Stanley Rice.