Beginner Gardening: Ok here is another one I need help with identifying , 1 by Cindee514

Cindee514 wrote:
Ok here is another one for you. I have this tree growing in my yard. It's been there for about three years now. Every year it grows straight up about 3 feet. It grows a bunch of branches out the top of the main shoot. Each branch has about 17 smooth green leaves, one across from the other one. With a leave at the end. The branches turn yellow and fall off every winter. It does not flower and has not grown any fruit on it as of yet. When the branches fall off the main the main stem, it leaves a kinda upside down triangle. If anyone has any ideas please let me know. Thanks!