And yes, that is ONE leaf in the picture!
Oklahoma weather is hard on trees, ice coating the branches, fifty mile per hour sustained wind speed, tornadoes, two blizzards in as many weeks, not to mention the heat and drought. Having so few branches makes the tree very resistant to storm damage. It has no "sails" to catch the wind and the branches it has are extra stout.
Also, the winter is friendly to the trees appearance. Without all of the spindly outer twigs, the tree does not look so bare and makes for a striking and solid look.
Notice the guy in blue to the left of the tree!
This in one of the most versatile trees I know about, it will grow well in every state and into Canada and Mexico. It thrives in moist rich soil but it also does well in the hot, dry, clay-pit that is central Oklahoma. Roots are not a problem, it makes a great street tree provided enough over head room is given. Regularly 70-80 feet tall and 50 feet wide with the potential for larger, they need room (but just a little!). Stately Manor is a "dwarf" male(seedless) variety at only 50' tall by 20' wide.
Water heavily the first couple years and you will have a extremely drought resistant specimen that will only require water in the driest of summers. Pruning is unnecessary if planting location was wise. Buy in winter so you know what your getting (male or female). Both are needed to seed but close proximity is not necessary. Pick one without many branches below seven feet or so; they are only going to get larger and you don't want to have to duck do you?