Probably late to the thread...at first glance I thought the pot was round but it has kind of an oval shape to it.
If it had been round I would have said some species of maple in a fukinagashi style....
But because it is on the oval side, I would say a Ginko in an Usumoyou styling. (Usu Moyou is an informal upright with a trunk on the more narrow side.)
To me not only species, but styling of the tree is important in determining how the pot will best work for a display.
Somebody also mentioned Fuji (Wisteria) and if you go with that do it in a Shakkan styling to get the image of the tree overhanging a riverbank...