Delonix Regia bonsai?
I originally posted about delonix regia as a container plant on the houseplant forum, as it's a warm weather plant and couldn't survive winters outside in my area in my area, and I've done some additional research. Apparently they can live well inside, but they get rather big.
I did some additional research on using them as bonsai. Apparently it can be done, but it's not very common. It sounds like one of the biggest problems is that the leaves are a bit on the large side, and that the trees don't branch very much if used as bonsai, although I'm getting inconsistent information.
I get the impression that delonx regia, if used as a container plant, bonsai or otherwise, defoliates if brought in for the winter although apparently it comes out of this okay.