These are a common TX tree but I can't find it in any of my books. On the first one, I am guessing some kind of OAK but what kind? The second one I think is a type of ELM. Somebody please help.
quercus- oak. In the piney woods probably a post oak. Second leaf reminds me of slippery elm (just try to lop those branches and the darn thing cuts halfway across and then refuses to cut in two). Aw, I don't have my tree link on this computer...brb
not a post oak, post oaks have a definite cross shape, found my place tho- http://aggie-horticulture.tamu.edu/ornamentals/natives/indexcommon.htm#Q hope that link works...lets see, there are also red oaks
just cruise the O for oaks- piney woods have a few pin oaks, black oaks, white oaks, chuckle, bark changes on these, so branches are nice to help id
Elm looks like cedar elm. Ulmus crassifolia. Oak looks like white oak type.
Are you looking through a full glass - or an empty glass - to focus on those images?
Probably seeing thru my memories, Old Wrangler doesn't often close his threads, but I had wondered if he had found anything...
The leaf looks like an Overcup Oak, which is a bottom land or stream side species.
There is a lot of variety in post oaks, so it could be Quercus stellata.
If it is growing on dry land I would guess from a distance that it is a post oak, (white oak family).
The elm is either winged elm (Ulmus alatta) or Cedar Elm, noted above. Both would be native in East Texas.