Tree Guilds App

One thing that would be really helpful would be an app or a site where one can get detailed descriptions of various plants, shrubs and trees in order to design guilds.

I mean detailed descriptions that include, for instance, the size of a tree or plants spread and its height at full growth. I once saw a list of trees for West Bengal that had silhouettes of the trees at full height showing the form of each tree, there was a human silhouette also standing under each tree that helped one gauge the scale.

I'm looking for something like that as a tool to help design guilds in sub tropical climates such as West Bengal

Has anyone come across anything like that?

Thanks

Greg