Bee Flower And Me

I'm stumped again

Without a doubt we have the most gorgeous flower growing in our backyard that I have ever seen. It is a beautiful warm yellow with a star-shaped center that reminds me of gossamer. The plant is currently about 5 feet tall with a woody stem. The single flowers are four lobed opening in the morning and closed by evening. Leaves are arrow-shaped with smooth edges. The unnamed plant is growing by the edge of the yard where it gets full sun and occasionally is flooded by the pond behind our yard. What is it? That's the question. I've searched every reference book I have and have also looked on various sites on the internet. The trouble is that since I've literally never seen anything like it I don't even have a suggested starting point for the search to begin. I've tried yellow flowers, shrubs, daily bloomers but still have come up dry. So here's the challenge for my gardening friends in the Florida region. Take a close look at the picture and see if you can identify this sunny plant. If you can I will praise you to the point of embarrassment and link your site for all of our readers to see. Happy Florida Gardening.