This was given to me about 7 years ago when I lived in NJ. I kept in in the house and a for a few years I would move it outside in the summer. The leaves fall off in the fall and grow back in the spring. I have tried to find out what it is, but have had no luck. The trunk is covered with sharp barbs. I moved to florida this summer and thought the leaves would stay on throughout the year, but they fell off in early november. I would like to know what it is so I can take better care of it. Thank you.