Oh Larkie -- why didn't I just send this to you in the first place??? I was thinking maybe a white willow - but I don't know. No one has given me a positive ID -- I guess I'll have to take it to the town arborist. I have to get a new "sample" as atomic kitty Tasz ATE the leaves and threw my antique bottle I had it in, all the way into the hallway!
Thanks for the ideas - at least I am sure now I'm on the right track...I KNOW it's in the willow family. Will post the results if I ever catch up to the town arborist.