I'm not sure, but it looks like one of those 'weed trees' - we get something similar around here that grows in the cracks between a building and the pavement.....

Poor little thing!

Looks like some variety of thornless honey locust to me.

We have a similar one in smack dab in front of our home -- it was plopped into the ground by our HOA last year, so our street would one day have a shady lane.

Laura,
I wondered if that might be what it is. I thought it looked a bit like the picture I've seen, but having never seen one for sure, I wasn't positive. It is a bit sad, I know. My poor trees. That one didn't even get the little bit of extra care this summer that the rest did, since I knew it would have to move. I didn't want to do anything to make it grow bigger. It will get some TLC when I move it though.

The rest of the trees got a little alpaca poo feeding, a little water ring in the dirt (the trees are all small still), and some wood mulch. I even propped up a little evergreen (less than 2' tall) that was growing crooked, so it might grow up straight and tall someday. It seemed to be working last time I checked.

Sometimes I feel like I need to apologize for my landcape. It's really not my fault, we've only been here since January! : )