I am 90% sure that is Osage Orange. The end grain shot is almost a dead ringer, and the orangish yellow color is very characteristic of Osage. North Central TX is also in the tree's native range.
It is definitely not a maple, as maple is a diffuse porus hardwood, and the wood you have pictured is definitely ring porus. If you can get a clearer shot of the end grain, I imagine you could rule out elm if the earlywood pores are filled with tyloses. Slippery elm, american elm, and rock elm can all share similarities with osage, but the over abundance of tyloses will always set Osage apart.
Osage End Grain:
osage-orange-endgrain.jpg
Slippery (Red) Elm End Grain:
red-elm-endgrain.jpg
Kyle VanMeter