That last pic is quite good. It's consistent with some pecan species, but to be sure, I'd still need a better image. You have to get closer to the wood, if your camera can be focused so close (1" to 1.5")
I am going to take a piece with me to work and use my digital microscope to get a pic. I know that will do the trick! :)
I'll try to get it tomorrow for you guys. Thanks!
@Mr. Peet is there a way to tell a burl from a canker from exterior traits of some kind, or do you have to cut into it to find ito?