Not a big fan of tobacco, but it is an interesting plant. The natives used these plants for smoking and incense. Like any tobacco plant they are somewhat poisonous.
Tree Tobacco can begin to look like a tree and I've seen them well over 6' tall. In fact this one is probably over 8' tall in this wash. Not really much of a tree, just tall like a young tree. Certainly more tree-like than shrub-like, I guess.
Here is a cluster of the tubular flowers
A close up...