The BBC reports on new research on the complex reasons leaves come in many sizes
The huge variety of leaves in the plant kingdom has long been a source of wonder and fascination.
The conventional wisdom is that leaf size is limited by the balance between how much water is available to a plant and the risk of overheating.
However, a study of more than 7,000 plant species around the world suggests the answer may be more complex.
Read story at Clues to why leaves come in many sizes – BBC News
Natural History Wanderings 
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