Copper Beech matthiasbaldwinpark
Copper Beech Yale Nature Walk
Why most leaves have the upper surface more green and shiny than the lower ones? - Quora
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On the Beech – Natural Latin
why do some maples retain their dead leaves?
What causes the colour of a leaf to change from green to red, orange or brown? When does this happen in different trees? - Quora
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Marcescence - Wikipedia