Hey folks. I've been working on my tree ID skills, and have been paying extra attention to trees I encounter to get familiar with the local flora. This guy is growing in my backyard, and I'm fairly confident it is a basswood. It has alternate simple leaves that are rather heart-shaped, a lot of sprouts growing from around the base of the trunk, fibrous inner bark, and a very white pith. The terminal twigs are very flexible and pliable, and the leaves grow quite large. Many are larger than my L-XL size hands. The wood is pretty soft, and quite lightweight. According to everything I read, this is all fairly typical of a basswood. But here's one thing that make me second guess: the base of basswood leaves are always described as uneven, while all these leaves seem pretty even to me. The only other candidate I could think of was a cottonwood, and the leaves are not not triangular enough for a cottonwood IMO. Update: Definitely doesn't seem to be a basswood. Been watching it all summer, and there have been no blooms. The leaves aren't quite right either. The other best candidate is mulberry, but there haven't been any berries on this three either, and the leaves look distinctly different from other mulberry trees in my yard. What say ye?