I am the person who posted this in another forum.
I am trying to ID this for a customer.
It's about 15-20ft tall, fast growing, spreads by underground runners. It's even coming up under his house.
His neighbor calls it a "Bong" tree.
Leaves are 20-24" wides, powdery white underneath.
Several photos of the tree at the link posted

Here is a link that might be useful: Mystery tree

This post was edited by kapri on Tue, Apr 29, 14 at 3:47

Tetrapanax papyrifer

Thank you saltcedar, I believe you are correct.
This helps me out a lot, I really appreciate it.