I've introduced myself in a few different forums over the past few day, but a quick intro....We bought our house June 2012 from a gentleman who's mother had recently past. She had lived in this house since the late 40s/early 50s, and had a few nice flower beds. They're a bit over-grown now, but I'm working on them. As plants come up and start to bloom, I'm sure I'll be here a lot looking for IDs.
The first one is this giant tree. It's seriously huge. It takes 3 adults to circle it. I've heard some people call it a cotton wood, others called it a ... poplar, maybe. Here she is.
Full length
Buds
Bark
I know I have more pictures of it somewhere, let me keep looking