Help ID this Walnut look alike

Does butternut also have those chambers? I have a thread here looking to identify something in the walnut family that I was pretty sure was not black walnut (wrong bark). Not mentioned there is that the couple twigs I had did have the chambers. It dried pretty quick and pretty light, so I went with butternut. Whatever it was, it looked nothing like the wood in this thread.

Edit: just googled, it does. But I also found a site that shows butternut wood with no color difference between heartwood and sapwood: http://www.dnr.state.oh.us/forestry/trees/butternut/tabid/5347/Default.aspx

Well now, it's possible it was never pollinated, some English Walnut (Carpathian, for instance) need 2 trees to pollinate well, others are self pollinating. Any other of the same tree in the area?

I'm stickin' with English (Carpathian) Walnut

I'm no expert in american wood species but try your luck at

http://forums.arborday.org/forum/index.php

There are quite a lot of tree experts hanging around, maybe someone can help you further.
I guess it will be easier for you to identify the tree as you have seen the leaves, etc.
let us know if it was of any help