Without a doubt the pics show Siberian Elm. I've cut a couple dozen cords of it in the last couple years. The wood lot it came from also had red elm, and believe me the two can be hard to tell apart - some cross breeding going on there makes it difficult. Generally the siberian elm leaves will always be smaller and the leaf top surface will be somewhat glossy and slippery. True red elm leaves will usually be larger (some exceptions) and have a sandpapery feel on the top surface. Bark is not always a good indicator on elms, but the true red elms will have thinner bark than siberian. Siberian bark with have layers in the bark alternating between light and darker layers. Red elm bark much less so. Both red and siberian elm usually are easier to split than american - some trees are bad no matter what. As Whitespider mentioned - red and siberian elm split best green - leave them in the round for a while and the splitting becomes tougher. Once the splits are dried down - siberian will be noticabley lighter than red elm splits.
I don't understand the confusion between red/siberian vs american elm, just cut into the wood and American will be obvious - much whiter wood with a brown looking stain in the middle.
I don't understand the confusion between red/siberian vs american elm, just cut into the wood and American will be obvious - much whiter wood with a brown looking stain in the middle.