Hi, Straightree.
Welcome to EvC!
straightree writes:
The more I look to the pictures I have of these leaves, the more I think Acer negundo is in the way of evolving versus lobed leaves.
Is there an advantage in changing the shape of the leaves?
If not, it could not have evolved by natural selection. It may have evolved through
genetic drift, which is basically random happenstance.
-Bluejay
Darwin loves you.