This winter, I saw maybe a dozen of these seedlings in our neighborhood. I didn’t recognize it, so I took one home and potted it up. It has grown quickly, and is about 3 or 3.5 feet in these photos. The last photo shows the back of a leaf.
Thanks for your help,
I seem to have lost your original inquiry with the photos. It would be good if you could send it again with current pictures. I can only guess at this one – it looks like it could be a mulberry, Morus alba, which is spread by birds. However, that is the best I can do at the moment.
Dr. Steven Hill, Botanist, SCNPS