What is this tree?

[SDB777]

Okay, I'm pretty good with tree ID, but this one has me a little stumped.... I'll probably have one of those "Oh crap, it XXXXXXX!" when the leaves come out.

Few details:
#1: North central Arkansas for the location.
#2: Have seen it in the woods as well as a few yards and roadsides.
#3: The bark is smooth when the tree is small(under 5" diameter), the older tree I've seen has rough deep ridge type bark, grayish brown.

Photo's of strange ball/glode things near branch tips:

If anyone has any ideas.....throw me a bone.
Scott B

 

[forestryworks]

My guess is Western Soapberry.

 

[SDB777]

Thanks. Think it might just be....

Guess I'll leave it be, was thinking about felling one and getting some slabs, cut some blanks, drying 'em and give 'em a turn on the lathe. Think the possible rashes and the poisonous leaves gives it a thumbs down.

Scott B