I purchased this at the father's day show in 2012. It is a leguminous tree from tropical Africa and in its natural habitat it produces an edible pod like fruit. Mine has never produced fruit.
It took some time to learn how to care for it. Interestingly I keep it indoors under lights all year round now. It did not prosper when I put it our doors in the summer. That may have been due to my not caring for it correctly. Next year I am going to try outdoors again.
The first 2 pictures are before and after pruning. It is a vigorous grower and I typically prune it to this extent once and often twice a year.
Although it is a vigorous grower I have not seen the trunk girth increase much in the past 8 years. But it does have interesting bark.