Tree I'd help?

[Globetrotter.uk]

I went walking yesterday and came across a tree, now I thought it was White willow. The leaves are dark green and tapered at both end like willow. However the bark is green and smooth. Sorry I forgot my camera again.

 

[dwardo]

There are quite a few willows out there and some have green bark. Some pics of the branch, leaf, and bark would help nail it,