Joe - Nah. Not an Amelanchier. Foliage is not quite right, and Amelanchier flowers have skinner petals. Carol - that could be it. Definitely something in the Rosaceae family, I think. My only hesitation is that this garden was neglected for quite some time, is overrun with lonicera (both vines and shrubs), berberis, Euonymus alatus, etc. And these shrubs are covering an entire side of the suburban yard. It looks like they've been there for a while, and they're taking over along with the rest. Has P. villosa been around for a while? Does it show invasive tendencies here?

By Joe, I think you got it. It looks exactly like the photo from http://www.smgrowers.com/products/plants/plantdisplay.asp?plant_id=1295 Thanks for the help.

Lonicera, honeysuckle.

Looks like Robinia pseudoacacia to me too. Where I grew up in Ohio it was an early succession tree in old fields and vacant lots; grows fast and doesn't live too long compared to, say, maples or oaks. On the plus side it has flowers in the spring that look like white wisteria and smell great; I've never understood why people didn't plant it just for the flowers.