I have started a forest, using young trees that are springing up in my back
yard from the large tree growing there.

I would like to identify it. It looks a bit like a Jacaranda in the trunk
and branches and leaves, but the small flowers are bright yellow. It drops
it's leaves and flowers at least once a year (not good for the pool :-))
and has small seedpods about an inch or so long, shaped like a thin flat
oval wing with a seed bulging in one corner.

Any guesses?