We live in Denver and replaced some of our lawn with mulch a few years ago. Earlier this summer a new friend appeared where we have not planted anything ourselves. We used to have a maple tree about 20 feet away (cut down and the stump ground out) and 3 failed attempts at a pear tree about 12 to 15 feet away (but we don't recall the 8-9 foot trees ever having leaves this shape and certainly not as large as this!).
This plant has spade like leaves as seen in the pictures, and is current about a foot and a half to two feet tall after appearing a month or two ago. We have been watering it every day, curious what it would turn into.
Thank you for your assistance!