Another day…

Leaves continue to grow — shown here are bur oak and sumac,

 some of the later leaf-outs.  They are still small, but getting bigger every day!  I love the curled, deeply-veined, red-tinged baby leaves, so full of character at this stage.

Now… Please, help me ID this mystery tree.  OK.  I admit.  I havent’ looked very hard.  But I have no idea what it is (shown here close-up and from slightly further away).  I also don’t know if these leaves are full-sized or still growing.  Ideas appreciated, thank you.