Tree (i think) identification

Must admit the walnut family did cross my mind.

 

Those white spots on the stem look familiar.

 

pecans seem to have a faintly toothed edge and aren't so glossy.
http://images.google.co.uk/imgres?imgurl=http://pics.davesgarden.com/pics/Wingnut_2002-05-29_336.jpg&imgrefurl=http://davesgarden.com/pf/showimage/4462/&h=819&w=614&sz=160&tbnid=D1 QjBIEjYd3PjM:&tbnh=143&tbnw=107&hl=en&start=19&prev=/images%3Fq%3Dpecan%2Bseedling%26svnum%3D10%26hl%3Den%26lr%3D%26ie%3DUTF-8%26safe%3Doff%26sa%3DG

Still think Pagoda tree seedling looks most like- although it's seed is shown as black it it is bean like and does have a green outer coating like walnuts.